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supramolecular complexes.</title> <meta name="description" content="Search results for: supramolecular complexes."> <meta name="keywords" content="supramolecular complexes."> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="supramolecular complexes."> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 398</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: supramolecular complexes.</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">398</span> Analysis of Kinetin Supramolecular Complex with Glytsirrizinic Acid and Based by Mass-Spectrometry Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bakhtishod%20Matmuratov">Bakhtishod Matmuratov</a>, <a href="https://publications.waset.org/abstracts/search?q=Sakhiba%20Madraximova"> Sakhiba Madraximova</a>, <a href="https://publications.waset.org/abstracts/search?q=Rakhmat%20Esanov"> Rakhmat Esanov</a>, <a href="https://publications.waset.org/abstracts/search?q=Alimjan%20Matchanov"> Alimjan Matchanov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Studies have been performed to obtain complexes of glycyrrhizic acid and kinetins in a 2:1 ratio. The complex of glycyrrhizic acid and kinetins in a 2:1 ratio was considered evidence of the formation of a molecular complex by determining the molecular masses using chromato-mass spectroscopy and analyzing the IR spectra. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=monoammonium%20salt%20of%20glycyrrhizic%20acid" title="monoammonium salt of glycyrrhizic acid">monoammonium salt of glycyrrhizic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=glycyrrhizic%20acid" title=" glycyrrhizic acid"> glycyrrhizic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=supramolecular%20complex" title=" supramolecular complex"> supramolecular complex</a>, <a href="https://publications.waset.org/abstracts/search?q=isomolar%20series" title=" isomolar series"> isomolar series</a>, <a href="https://publications.waset.org/abstracts/search?q=IR%20spectroscopy" title=" IR spectroscopy"> IR spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/151906/analysis-of-kinetin-supramolecular-complex-with-glytsirrizinic-acid-and-based-by-mass-spectrometry-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151906.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">177</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">397</span> Experimental and Theoretical Characterization of Supramolecular Complexes between 7-(Diethylamino)Quinoline-2(1H)-One and Cucurbit[7] Uril</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kevin%20A.%20Droguett">Kevin A. Droguett</a>, <a href="https://publications.waset.org/abstracts/search?q=Edwin%20G.%20P%C3%A9rez"> Edwin G. Pérez</a>, <a href="https://publications.waset.org/abstracts/search?q=Denis%20Fuentealba"> Denis Fuentealba</a>, <a href="https://publications.waset.org/abstracts/search?q=Margarita%20E.%20Aliaga"> Margarita E. Aliaga</a>, <a href="https://publications.waset.org/abstracts/search?q=Ang%C3%A9lica%20M.%20Fierro"> Angélica M. Fierro</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Supramolecular chemistry is a field of growing interest. Moreover, studying the formation of host-guest complexes between macrocycles and dyes is highly attractive due to their potential applications. Examples of the above are drug delivery, catalytic process, and sensing, among others. There are different dyes of interest in the literature; one example is the quinolinone derivatives. Those molecules have good optical properties and chemical and thermal stability, making them suitable for developing fluorescent probes. Secondly, several macrocycles can be seen in the literature. One example is the cucurbiturils. This water-soluble macromolecule family has a hydrophobic cavity and two identical carbonyl portals. Additionally, the thermodynamic analysis of those supramolecular systems could help understand the affinity between the host and guest, their interaction, and the main stabilization energy of the complex. In this work, two 7-(diethylamino) quinoline-2 (1H)-one derivative (QD1-2) and their interaction with cucurbit[7]uril (CB[7]) were studied from an experimental and in-silico point of view. For the experimental section, the complexes showed a 1:1 stoichiometry by HRMS-ESI and isothermal titration calorimetry (ITC). The inclusion of the derivatives on the macrocycle lends to an upward shift in the fluorescence intensity, and the pKa value of QD1-2 exhibits almost no variation after the formation of the complex. The thermodynamics of the inclusion complexes was investigated using ITC; the results demonstrate a non-classical hydrophobic effect with a minimum contribution from the entropy term and a constant binding on the order of 106 for both ligands. Additionally, dynamic molecular studies were carried out during 300 ns in an explicit solvent at NTP conditions. Our finding shows that the complex remains stable during the simulation (RMSD ~1 Å), and hydrogen bonds contribute to the stabilization of the systems. Finally, thermodynamic parameters from MMPBSA calculations were obtained to generate new computational insights to compare with experimental results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=host-guest%20complexes" title="host-guest complexes">host-guest complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20dynamics" title=" molecular dynamics"> molecular dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=quinolin-2%281H%29-one%20derivatives%20dyes" title=" quinolin-2(1H)-one derivatives dyes"> quinolin-2(1H)-one derivatives dyes</a>, <a href="https://publications.waset.org/abstracts/search?q=thermodynamics" title=" thermodynamics"> thermodynamics</a> </p> <a href="https://publications.waset.org/abstracts/161151/experimental-and-theoretical-characterization-of-supramolecular-complexes-between-7-diethylaminoquinoline-21h-one-and-cucurbit7-uril" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/161151.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">92</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">396</span> Synthesis of Novel Metallosurfactants for Drug Delivery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Belghait">Fatima Zohra Belghait</a>, <a href="https://publications.waset.org/abstracts/search?q=Nawal%20Cheikh"> Nawal Cheikh</a>, <a href="https://publications.waset.org/abstracts/search?q=Oscar%20Palacios"> Oscar Palacios</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramon%20Barnadas"> Ramon Barnadas</a>, <a href="https://publications.waset.org/abstracts/search?q=Pau%20Bayon"> Pau Bayon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Metalloporphyrin and its derivatives play an important role in different scientific areas due to its tetradentate vacant site in the center that is suitable for metal coordination. Metalosomes (MTS) are supramolecular aggregates (similar to liposomes) generated by the self-assembly of compounds similar to phospholipids (with a polar and a hydrophobic part), but incorporating, as part of their membrane, molecules that contain bound metals. The aim of our work is to synthesise metalosomes containing catioinc amphiphilic porphyrin and their complexes with Fe and Cu to study their therapeutical applications. All synthesized compounds were confirmed with Dynamic Light Scattering; elemental analysis, Ultraviolet–visible spectroscopy <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=metalloporphyrin" title="metalloporphyrin">metalloporphyrin</a>, <a href="https://publications.waset.org/abstracts/search?q=amphiphilique%20porphyrin" title=" amphiphilique porphyrin"> amphiphilique porphyrin</a>, <a href="https://publications.waset.org/abstracts/search?q=metalosomes" title=" metalosomes"> metalosomes</a>, <a href="https://publications.waset.org/abstracts/search?q=supramolecular" title=" supramolecular"> supramolecular</a> </p> <a href="https://publications.waset.org/abstracts/195168/synthesis-of-novel-metallosurfactants-for-drug-delivery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/195168.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">0</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">395</span> Synthesis, Investigation, DFT Study and Biologically Activity of Zirconium (IV) Complexes with Diammie Complexes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salem%20El%20Ashoor">Salem El Ashoor</a>, <a href="https://publications.waset.org/abstracts/search?q=Fathia%20M.%20El-Meheishi"> Fathia M. El-Meheishi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ibtisam%20M.%20Diab"> Ibtisam M. Diab</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Zirconium diammin and triammin complexes can be possess biological activities, these complexes were synthesized via the reaction equimolar quantity of (1:10-phenanthroline){NC3H3(C6H2)NC3H3} (L1) or 4-4-amino phenazone {ONC6H5(NH)CH(NH2} (L2) or diphenyl carbizon {HNNCO(NH)2(C6H5)} (L3) with Zirconium Salt {ZrOCl2} in ratio (1:1) to form complexes [{NC3H3(C6H2)NC3H3}ZrOCl2}] [ZrOCl2L1], [{(O2NC6H4(NH)(NH2)}ZrOCl2] [ZrOCl2L2] and [{HNNCO(NH)2(C6H5)ZrOCl2}] [ZrOCl2L3] respectively. The characterization of these complexes were follow by using Fourier Transform Infrared (FT-IR) and UV-Visible spectroscopy. Also a variable temperature study of these complexes has been followed by using UV-Visible spectroscopy to follow electronic transform behaviors under temperature control also DFT study calculation was follow these complexes via the information from FT-IR and UV-Visible spectroscopy. A coordination number of these complexes of types five and six of the geometry can be suggested. These complexes were found to shown deferent inhibition to the growth of bacterial strains of Bacillus spp & Klebsiella spp & E.coli & proteus spp & pseudomona spp) while all complexes were in deferent's concentration (0.001, 0.2 and 1M) and the result as evidenced from the presence. For better understanding these complexes were examined by using Density functional theory (DFT) calculation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=%281%3A10-phenanthroline%29%20%28L1%29" title="(1:10-phenanthroline) (L1)">(1:10-phenanthroline) (L1)</a>, <a href="https://publications.waset.org/abstracts/search?q=4-4-amino%20phenazone%20%28L2%29" title=" 4-4-amino phenazone (L2)"> 4-4-amino phenazone (L2)</a>, <a href="https://publications.waset.org/abstracts/search?q=diphenyl%20carbizon%20%28L3%29" title=" diphenyl carbizon (L3)"> diphenyl carbizon (L3)</a>, <a href="https://publications.waset.org/abstracts/search?q=DFT%20study" title=" DFT study"> DFT study</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial" title=" antibacterial"> antibacterial</a> </p> <a href="https://publications.waset.org/abstracts/4043/synthesis-investigation-dft-study-and-biologically-activity-of-zirconium-iv-complexes-with-diammie-complexes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4043.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">414</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">394</span> Transition Metal Bis(Dicarbollide) Complexes in Design of Molecular Switches</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Igor%20B.%20Sivaev">Igor B. Sivaev</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Design of molecular machines is an extraordinary growing and very important area of research that it was recognized by awarding Sauvage, Stoddart and Feringa the Nobel Prize in Chemistry in 2016 'for the design and synthesis of molecular machines'. Based on the type of motion being performed, molecular machines can be divided into two main types: molecular motors and molecular switches. Molecular switches are molecules or supramolecular complexes having bistability, i.e., the ability to exist in two or more stable forms, among which may be reversible transitions under external influence (heating, lighting, changing the medium acidity, the action of chemicals, exposure to magnetic or electric field). Molecular switches are the main structural element of any molecular electronics devices. Therefore, the design and the study of molecules and supramolecular systems capable of performing mechanical movement is an important and urgent problem of modern chemistry. There is growing interest in molecular switches and other devices of molecular electronics based on transition metal complexes; therefore choice of suitable stable organometallic unit is of great importance. An example of such unit is bis(dicarbollide) complexes of transition metals [3,3’-M(1,2-C₂B₉H₁₁)₂]ⁿ⁻. The control on the ligand rotation in such complexes can be reached by introducing substituents which could provide stabilization of certain rotamers due to specific interactions between the ligands, on the one hand, and which can participate as Lewis bases in complex formation with external metals resulting in a change in the rotation angle of the ligands, on the other hand. A series of isomeric methyl sulfide derivatives of cobalt bis(dicarbollide) complexes containing methyl sulfide substituents at boron atoms in different positions of the pentagonal face of the dicarbollide ligands [8,8’-(MeS)₂-3,3’-Co(1,2-C₂B₉H₁₀)₂]⁻, rac-[4,4’-(MeS)₂-3,3’-Co(1,2-C₂B₉H₁₀)₂]⁻ and meso-[4,7’-(MeS)₂-3,3’-Co(1,2-C₂B₉H₁₀)₂]⁻ were synthesized by the reaction of CoCl₂ with the corresponding methyl sulfide carborane derivatives [10-MeS-7,8-C₂B₉H₁₁)₂]⁻ and [10-MeS-7,8-C₂B₉H₁₁)₂]⁻. In the case of asymmetrically substituted cobalt bis(dicarbollide) complexes the corresponding rac- and meso-isomers were successfully separated by column chromatography as the tetrabutylammonium salts. The compounds obtained were studied by the methods of ¹H, ¹³C, and ¹¹B NMR spectroscopy, single crystal X-ray diffraction, cyclic voltammetry, controlled potential coulometry and quantum chemical calculations. It was found that in the solid state, the transoid- and gauche-conformations of the 8,8’- and 4,4’-isomers are stabilized by four intramolecular CH···S(Me)B hydrogen bonds each one (2.683-2.712 Å and 2.709-2.752 Å, respectively), whereas gauche-conformation of the 4,7’-isomer is stabilized by two intramolecular CH···S hydrogen bonds (2.699-2.711 Å). The existence of the intramolecular CH·S(Me)B hydrogen bonding in solutions was supported by the 1H NMR spectroscopy. These data are in a good agreement with results of the quantum chemical calculations. The corresponding iron and nickel complexes were synthesized as well. The reaction of the methyl sulfide derivatives of cobalt bis(dicarbollide) with various labile transition metal complexes results in rupture of intramolecular hydrogen bonds and complexation of the methyl sulfide groups with external metal. This results in stabilization of other rotational conformation of cobalt bis(dicarbollide) and can be used in design of molecular switches. This work was supported by the Russian Science Foundation (16-13-10331). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=molecular%20switches" title="molecular switches">molecular switches</a>, <a href="https://publications.waset.org/abstracts/search?q=NMR%20spectroscopy" title=" NMR spectroscopy"> NMR spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20crystal%20X-ray%20diffraction" title=" single crystal X-ray diffraction"> single crystal X-ray diffraction</a>, <a href="https://publications.waset.org/abstracts/search?q=transition%20metal%20bis%28dicarbollide%29%20complexes" title=" transition metal bis(dicarbollide) complexes"> transition metal bis(dicarbollide) complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20chemical%20calculations" title=" quantum chemical calculations"> quantum chemical calculations</a> </p> <a href="https://publications.waset.org/abstracts/78947/transition-metal-bisdicarbollide-complexes-in-design-of-molecular-switches" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78947.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">172</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">393</span> Oxidovanadium(IV) and Dioxidovanadium(V) Complexes: Efficient Catalyst for Peroxidase Mimetic Activity and Oxidation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mannar%20R.%20Maurya">Mannar R. Maurya</a>, <a href="https://publications.waset.org/abstracts/search?q=Bithika%20Sarkar"> Bithika Sarkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Fernando%20Avecilla"> Fernando Avecilla</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Peroxidase activity is possibly successfully used for different industrial processes in medicine, chemical industry, food processing and agriculture. However, they bear some intrinsic drawback associated with denaturation by proteases, their special storage requisite and cost factor also. Now a day’s artificial enzyme mimics are becoming a research interest because of their significant applications over conventional organic enzymes for ease of their preparation, low price and good stability in activity and overcome the drawbacks of natural enzymes e.g serine proteases. At present, a large number of artificial enzymes have been synthesized by assimilating a catalytic center into a variety of schiff base complexes, ligand-anchoring, supramolecular complexes, hematin, porphyrin, nanoparticles to mimic natural enzymes. Although in recent years a several number of vanadium complexes have been reported by a continuing increase in interest in bioinorganic chemistry. To our best of knowledge, the investigation of artificial enzyme mimics of vanadium complexes is very less explored. Recently, our group has reported synthetic vanadium schiff base complexes capable of mimicking peroxidases. Herein, we have synthesized monoidovanadium(IV) and dioxidovanadium(V) complexes of pyrazoleone derivateis ( extensively studied on account of their broad range of pharmacological appication). All these complexes are characterized by various spectroscopic techniques like FT-IR, UV-Visible, NMR (1H, 13C and 51V), Elemental analysis, thermal studies and single crystal analysis. The peroxidase mimic activity has been studied towards oxidation of pyrogallol to purpurogallin with hydrogen peroxide at pH 7 followed by measuring kinetic parameters. The Michaelis-Menten behavior shows an excellent catalytic activity over its natural counterparts, e.g. V-HPO and HRP. The obtained kinetic parameters (Vmax, Kcat) were also compared with peroxidase and haloperoxidase enzymes making it a promising mimic of peroxidase catalyst. Also, the catalytic activity has been studied towards the oxidation of 1-phenylethanol in presence of H2O2 as an oxidant. Various parameters such as amount of catalyst and oxidant, reaction time, reaction temperature and solvent have been taken into consideration to get maximum oxidative products of 1-phenylethanol. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oxovanadium%28IV%29%2Fdioxidovanadium%28V%29%20complexes" title="oxovanadium(IV)/dioxidovanadium(V) complexes">oxovanadium(IV)/dioxidovanadium(V) complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=NMR%20spectroscopy" title=" NMR spectroscopy"> NMR spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=Crystal%20structure" title=" Crystal structure"> Crystal structure</a>, <a href="https://publications.waset.org/abstracts/search?q=peroxidase%20mimic%20activity%20towards%20oxidation%20of%20pyrogallol" title=" peroxidase mimic activity towards oxidation of pyrogallol"> peroxidase mimic activity towards oxidation of pyrogallol</a>, <a href="https://publications.waset.org/abstracts/search?q=Oxidation%20of%201-phenylethanol" title=" Oxidation of 1-phenylethanol"> Oxidation of 1-phenylethanol</a> </p> <a href="https://publications.waset.org/abstracts/39539/oxidovanadiumiv-and-dioxidovanadiumv-complexes-efficient-catalyst-for-peroxidase-mimetic-activity-and-oxidation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39539.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">341</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">392</span> Synthesis, Characterization and Catalytic Applications of Divalent Schiff Base Metal Complexes Derived from Amino Coumarins and Substituted Benzaldehydes and Acetophenones</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Srinivas%20Nerella">Srinivas Nerella</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A series of new heterodentate N, O-donor ligands derived from condensing 3-amino Coumarins with hydroxy benzaldehydes and acetophenones were used to afford new mononuclear Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Pd(II) coordination compounds. All the complexes were characterized by IR, 1H-NMR, 13C-NMR, Mass, ESR, Electronic spectra, Conductance, Magnetic and Thermal studies. The ligands show hexa coordination in Mn(II), Co(II), Ni(II), and Pd(II) complexes resulting octahedral geometries, while the ligands in Zn(II) and Cu(II) complexes show tetra coordination resulting tetrahedral and square planar geometries respectively. These mononuclear complexes were investigated as catalysts in the hydrothiolation of aromatic and aliphatic alkynes with thiols. These metal complexes were acted as versatile catalysts and gave good yields. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=schiff%20bases" title="schiff bases">schiff bases</a>, <a href="https://publications.waset.org/abstracts/search?q=divalent%20metal%20complexes%20of%20schiff%20bases" title=" divalent metal complexes of schiff bases"> divalent metal complexes of schiff bases</a>, <a href="https://publications.waset.org/abstracts/search?q=Catalytic%20activity" title=" Catalytic activity"> Catalytic activity</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrothiolation" title=" hydrothiolation"> hydrothiolation</a> </p> <a href="https://publications.waset.org/abstracts/17897/synthesis-characterization-and-catalytic-applications-of-divalent-schiff-base-metal-complexes-derived-from-amino-coumarins-and-substituted-benzaldehydes-and-acetophenones" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17897.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">415</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">391</span> Zinc (II) Complexes of Nitrogen, Oxygen and Sulfur Coordination Modes: Synthesis, Spectral Studies and Antibacterial Activities</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ayodele%20Odularu">Ayodele Odularu</a>, <a href="https://publications.waset.org/abstracts/search?q=Peter%20Ajibade"> Peter Ajibade</a>, <a href="https://publications.waset.org/abstracts/search?q=Albert%20Bolhuis"> Albert Bolhuis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study aimed at assessing the antibacterial activities of four zinc (II) complexes. Zinc (II) complexes of nitrogen, oxygen and sulfur coordination modes were synthesized using direct substitution reaction. The characterization techniques involved physicochemical properties (molar conductivity) and spectroscopic techniques. The molar conductivity gave the non-electrolytic nature of zinc (II) complexes. The spectral studies of zinc (II) complexes were done using electronic spectra (UV-Vis) and Fourier Transform Infra-red Spectroscopy (FT-IR). Spectral data from the spectroscopic studies confirmed the coordination of the mixed ligands with zinc (II) ion. The antibacterial activities of zinc(II) complexes of were all in supportive of Overtone’s concept and Tweedy’s theory of chelation for bacterial strains of S. aureus MRSA252 and E coli MC4100 because the zones of inhibition were greater than the corresponding ligands. In summary, all zinc (II) complexes of ZEPY, ZE1PH, ZE1PY and ZE135PY all have potentials for antibacterial activities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antibacterial%20activities" title="antibacterial activities">antibacterial activities</a>, <a href="https://publications.waset.org/abstracts/search?q=spectral%20studies" title=" spectral studies"> spectral studies</a>, <a href="https://publications.waset.org/abstracts/search?q=syntheses" title=" syntheses"> syntheses</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%28II%29%20complexes" title=" zinc(II) complexes "> zinc(II) complexes </a> </p> <a href="https://publications.waset.org/abstracts/43004/zinc-ii-complexes-of-nitrogen-oxygen-and-sulfur-coordination-modes-synthesis-spectral-studies-and-antibacterial-activities" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43004.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">281</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">390</span> Investigations of Inclusion Complexes of Imazapyr with 2-Hydroxypropyl(β/γ) Cyclodextrin Experimental and Molecular Modeling Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdalla%20A.%20Elbashir">Abdalla A. Elbashir</a>, <a href="https://publications.waset.org/abstracts/search?q=Maali%20Saad%20Mokhtar"> Maali Saad Mokhtar</a>, <a href="https://publications.waset.org/abstracts/search?q=FakhrEldin%20O.%20Suliman"> FakhrEldin O. Suliman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The inclusion complexes of imazapyr (IMA) with 2-hydroxypropyl(β/γ) cyclodextrins (HP β/γ-CD), have been studied in aqueous media and in the solid state. In this work, fluorescence spectroscopy, electrospray-ionization mass spectrometry (ESI-MS), and HNMR were used to investigate and characterize the inclusion complexes of IMA with the cyclodextrins in solutions. The solid-state complexes were obtained by freeze-drying and were characterized by Fourier transform infrared spectroscopy (FTIR), and powder X-ray diffraction (PXRD). The most predominant complexes of IMA with both hosts are the 1:1 guest: host complexes. The association constants of IMA-HP β-CD and IMA-HP γ -CD were 115 and 215 L mol⁻¹, respectively. Molecular dynamic (MD) simulations were used to monitor the mode of inclusion and also to investigate the stability of these complexes in aqueous media at atomistic levels. The results obtained have indicated that these inclusion complexes are highly stable in aqueous media, thereby corroborating the experimental results. Additionally, it has been demonstrated that in addition to hydrophobic interactions and van der Waals interactions the presence of hydrogen bonding interactions of the type H---O and CH---O between the guest and the host have enhanced the stability of these complexes remarkably. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=imazapyr" title="imazapyr">imazapyr</a>, <a href="https://publications.waset.org/abstracts/search?q=inclusion%20complex" title=" inclusion complex"> inclusion complex</a>, <a href="https://publications.waset.org/abstracts/search?q=herbicides" title=" herbicides"> herbicides</a>, <a href="https://publications.waset.org/abstracts/search?q=2-hydroxypropyl-%CE%B2%2F%CE%B3-cyclodextrin" title=" 2-hydroxypropyl-β/γ-cyclodextrin"> 2-hydroxypropyl-β/γ-cyclodextrin</a> </p> <a href="https://publications.waset.org/abstracts/86839/investigations-of-inclusion-complexes-of-imazapyr-with-2-hydroxypropylvgh-cyclodextrin-experimental-and-molecular-modeling-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86839.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">171</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">389</span> Comparative DNA Binding of Iron and Manganese Complexes by Spectroscopic and ITC Techniques and Antibacterial Activity </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Nejat%20Dehkordi">Maryam Nejat Dehkordi</a>, <a href="https://publications.waset.org/abstracts/search?q=Per%20Lincoln"> Per Lincoln</a>, <a href="https://publications.waset.org/abstracts/search?q=Hassan%20Momtaz"> Hassan Momtaz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Interaction of Schiff base complexes of iron and manganese (iron [N, N’ Bis (5-(triphenyl phosphonium methyl) salicylidene) -1, 2 ethanediamine) chloride, [Fe Salen]Cl, manganese [N, N’ Bis (5-(triphenyl phosphonium methyl) salicylidene) -1, 2 ethanediamine) acetate) with DNA were investigated by spectroscopic and isothermal titration calorimetry techniques (ITC). The absorbance spectra of complexes have shown hyper and hypochromism in the presence of DNA that is indication of interaction of complexes with DNA. The linear dichroism (LD) measurements confirmed the bending of DNA in the presence of complexes. Furthermore, isothermal titration calorimetry experiments approved that complexes bound to DNA on the base of both electrostatic and hydrophobic interactions. Furthermore, ITC profile exhibits the existence of two binding phases for the complex. Antibacterial activity of ligand and complexes were tested in vitro to evaluate their activity against the gram positive and negative bacteria. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Schiff%20base%20complexes" title="Schiff base complexes">Schiff base complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=ct-DNA" title=" ct-DNA"> ct-DNA</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%20dichroism%20%28LD%29" title=" linear dichroism (LD)"> linear dichroism (LD)</a>, <a href="https://publications.waset.org/abstracts/search?q=isothermal%20titration%20calorimetry%20%28ITC%29" title=" isothermal titration calorimetry (ITC)"> isothermal titration calorimetry (ITC)</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial%20activity" title=" antibacterial activity "> antibacterial activity </a> </p> <a href="https://publications.waset.org/abstracts/24799/comparative-dna-binding-of-iron-and-manganese-complexes-by-spectroscopic-and-itc-techniques-and-antibacterial-activity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24799.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">471</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">388</span> Synthesis and Biological Activity Evaluation of U Complexes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Kazem%20Mohammadi">Mohammad Kazem Mohammadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of anticancer agents forms an important part of the treatment of cancer of various types. Uranyl Complexes with DPHMP ligand have been used for the prevention and treatment of cancers. U(IV) metal complexes prepared by reaction of uranyl salt UO2 (NO3)2.6H2O with DPHMP in dry acetonitrile. Characterization of the ligand and its complexes was made by microanalyses, FT-IR, 1H NMR, 13C NMR and UV–Visible spectroscopy. These new complex showed excellent antitumor activity against two kinds of cancer cells that that are HT29:Haman colon adenocarcinoma cell line and T47D:human breast adenocarcinoma cell line. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=uranyl%20complexes" title="uranyl complexes">uranyl complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=DPHMP%20ligand" title=" DPHMP ligand"> DPHMP ligand</a>, <a href="https://publications.waset.org/abstracts/search?q=antitumor%20activity" title=" antitumor activity"> antitumor activity</a>, <a href="https://publications.waset.org/abstracts/search?q=HT29" title=" HT29"> HT29</a>, <a href="https://publications.waset.org/abstracts/search?q=T47D" title=" T47D"> T47D</a> </p> <a href="https://publications.waset.org/abstracts/23976/synthesis-and-biological-activity-evaluation-of-u-complexes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23976.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">470</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">387</span> Synthesis, Characterization and in vitro DNA Binding and Cleavage Studies of Cu(II)/Zn(II) Dipeptide Complexes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Jamsheera">A. Jamsheera</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Arjmand"> F. Arjmand</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20K.%20Mohapatra"> D. K. Mohapatra</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Small molecules binding to specific sites along DNA molecule are considered as potential chemotherapeutic agents. Their role as mediators of key biological functions and their unique intrinsic properties make them particularly attractive therapeutic agents. Keeping in view, novel dipeptide complexes Cu(II)-Val-Pro (1), Zn(II)-Val-Pro (2), Cu(II)-Ala-Pro (3) and Zn(II)-Ala-Pro (4) were synthesized and thoroughly characterized using different spectroscopic techniques including elemental analyses, IR, NMR, ESI–MS and molar conductance measurements. The solution stability study carried out by UV–vis absorption titration over a broad range of pH proved the stability of the complexes in solution. In vitro DNA binding studies of complexes 1–4 carried out employing absorption, fluorescence, circular dichroism and viscometric studies revealed the binding of complexes to DNA via groove binding. UV–vis titrations of 1–4 with mononucleotides of interest viz., 5´-GMP and 5´-TMP were also carried out. The DNA cleavage activity of the complexes 1 and 2 were ascertained by gel electrophoresis assay which revealed that the complexes are good DNA cleavage agents and the cleavage mechanism involved a hydrolytic pathway. Furthermore, in vitro antitumor activity of complex 1 was screened against human cancer cell lines of different histological origin. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dipeptide%20Cu%28II%29%20and%20Zn%28II%29%20complexes" title="dipeptide Cu(II) and Zn(II) complexes">dipeptide Cu(II) and Zn(II) complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=DNA%20binding%20profile" title=" DNA binding profile"> DNA binding profile</a>, <a href="https://publications.waset.org/abstracts/search?q=pBR322%20DNA%20cleavage" title=" pBR322 DNA cleavage"> pBR322 DNA cleavage</a>, <a href="https://publications.waset.org/abstracts/search?q=in%20vitro%20anticancer%20activity" title=" in vitro anticancer activity"> in vitro anticancer activity</a> </p> <a href="https://publications.waset.org/abstracts/38418/synthesis-characterization-and-in-vitro-dna-binding-and-cleavage-studies-of-cuiiznii-dipeptide-complexes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/38418.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">349</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">386</span> N₂O₂ Salphen-Like Ligand and Its Pd(II), Ag(I) and Cu(II) Complexes as Potentially Anticancer Agents: Design, Synthesis, Antimicrobial, CT-DNA Binding and Molecular Docking</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Laila%20H.%20Abdel-Rahman">Laila H. Abdel-Rahman</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Shaker%20S.%20Adam"> Mohamed Shaker S. Adam</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20M.%20Abu-Dief"> Ahmed M. Abu-Dief</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanan%20El-Sayed%20Ahmed"> Hanan El-Sayed Ahmed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this investigation, Cu(II), Pd(II) and Ag(I) complexes with the tetra-dentate DSPH Schiff base ligand were synthesized. The DSPH Schiff base and its complexes were characterized by using different physicochemical and spectral analysis. The results revealed that the metal ions coordinated with DSPH ligand through azomethine nitrogen and phenolic oxygen. Cu(II), Pd(II) and Ag(I) complexes are present in a 1:1 molar ratio. Pd(II) and Ag(I) complexes have square planar geometries while, Cu(II) has a distorted octahedral (Oh) geometry. All investigated complexes are nonelectrolytes. The investigated compounds were tested against different strains of bacteria and fungi. Both prepared compounds showed good results of inhibition against the selected pathogenic microorganism. Moreover, the interaction of investigated complexes with CT-DNA was studied via various techniques and the binding modes are mainly intercalative and grooving modes. Operating Environment MOE package was used to do docking studies for the investigated complexes to explore the potential binding mode and energy. Furthermore, the growth inhibitory effect of the investigated compounds was examined on some cancer cells lines. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tetradentate" title="tetradentate">tetradentate</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial" title=" antimicrobial"> antimicrobial</a>, <a href="https://publications.waset.org/abstracts/search?q=CT-DNA%20interaction" title=" CT-DNA interaction"> CT-DNA interaction</a>, <a href="https://publications.waset.org/abstracts/search?q=docking" title=" docking"> docking</a>, <a href="https://publications.waset.org/abstracts/search?q=anticancer" title=" anticancer"> anticancer</a> </p> <a href="https://publications.waset.org/abstracts/95277/n2o2-salphen-like-ligand-and-its-pdii-agi-and-cuii-complexes-as-potentially-anticancer-agents-design-synthesis-antimicrobial-ct-dna-binding-and-molecular-docking" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95277.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">244</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">385</span> Design, Spectroscopic, Structural Characterization, and Biological Studies for New Complexes via Charge Transfer Interaction of Ciprofloxacin Drug With π Acceptors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Alshammari">Khaled Alshammari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ciprofloxacin (CIP) is a common antibiotic drug used as a strudy electron donor that interacts with dynamic π -acceptors such as 2,3-dinitrosalsylic acid (HDNS) and Tetracyanoethylene (TCNE) for synthesizing a new model of charge transfer (CT) complexes. The synthesized complexes were identified using diverse analytical methods such as UV–vis spectra, photometric titration measurements, FT-IR, HNMR Spectroscopy, and thermogravimetric analysis techniques (TGA/DTA). The stoichiometries for all the formed complexes were found to be a 1:1 M ratio between the reactants. The characteristic spectroscopic properties such as transition dipole moment (µ), oscillator strength (f), formation constant (KCT), ionization potential (ID), standard free energy (∆G), and energy of interaction (ECT) for the CT-complexes were collected. The developed CT complexes were tested for their toxicity on main organs, antimicrobial activity, antioxidant activity, and biofilm formation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biological" title="biological">biological</a>, <a href="https://publications.waset.org/abstracts/search?q=biofilm" title=" biofilm"> biofilm</a>, <a href="https://publications.waset.org/abstracts/search?q=toxicity" title=" toxicity"> toxicity</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20analysis" title=" thermal analysis"> thermal analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=charge%20transfer" title=" charge transfer"> charge transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=spectroscopy" title=" spectroscopy"> spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/184291/design-spectroscopic-structural-characterization-and-biological-studies-for-new-complexes-via-charge-transfer-interaction-of-ciprofloxacin-drug-with-p-acceptors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/184291.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">57</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">384</span> Conventional and Computational Investigation of the Synthesized Organotin(IV) Complexes Derived from o-Vanillin and 3-Nitro-o-Phenylenediamine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Harminder%20Kaur">Harminder Kaur</a>, <a href="https://publications.waset.org/abstracts/search?q=Manpreet%20Kaur"> Manpreet Kaur</a>, <a href="https://publications.waset.org/abstracts/search?q=Akanksha%20Kapila"> Akanksha Kapila</a>, <a href="https://publications.waset.org/abstracts/search?q=Reenu"> Reenu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Schiff base with general formula H₂L was derived from condensation of o-vanillin and 3-nitro-o-phenylenediamine. This Schiff base was used for the synthesis of organotin(IV) complexes with general formula R₂SnL [R=Phenyl or n-octyl] using equimolar quantities. Elemental analysis UV-Vis, FTIR, and multinuclear spectroscopic techniques (¹H, ¹³C, and ¹¹⁹Sn) NMR were carried out for the characterization of the synthesized complexes. These complexes were coloured and soluble in polar solvents. Computational studies have been performed to obtain the details of the geometry and electronic structures of ligand as well as complexes. Geometry of the ligands and complexes have been optimized at the level of Density Functional Theory with B3LYP/6-311G (d,p) and B3LYP/MPW1PW91 respectively followed by vibrational frequency analysis using Gaussian 09. Observed ¹¹⁹Sn NMR chemical shifts of one of the synthesized complexes showed tetrahedral geometry around Tin atom which is also confirmed by DFT. HOMO-LUMO energy distribution was calculated. FTIR, ¹HNMR and ¹³CNMR spectra were also obtained theoretically using DFT. Further IRC calculations were employed to determine the transition state for the reaction and to get the theoretical information about the reaction pathway. Moreover, molecular docking studies can be explored to ensure the anticancer activity of the newly synthesized organotin(IV) complexes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DFT" title="DFT">DFT</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20docking" title=" molecular docking"> molecular docking</a>, <a href="https://publications.waset.org/abstracts/search?q=organotin%28IV%29%20complexes" title=" organotin(IV) complexes"> organotin(IV) complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=o-vanillin" title=" o-vanillin"> o-vanillin</a>, <a href="https://publications.waset.org/abstracts/search?q=3-nitro-o-phenylenediamine" title=" 3-nitro-o-phenylenediamine"> 3-nitro-o-phenylenediamine</a> </p> <a href="https://publications.waset.org/abstracts/89192/conventional-and-computational-investigation-of-the-synthesized-organotiniv-complexes-derived-from-o-vanillin-and-3-nitro-o-phenylenediamine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89192.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">383</span> Synthesis of Metal Curcumin Complexes with Iron(III) and Manganese(II): The Effects on Alzheimer's Disease</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Emel%20Yildiz">Emel Yildiz</a>, <a href="https://publications.waset.org/abstracts/search?q=Nurcan%20Bi%C3%A7er"> Nurcan Biçer</a>, <a href="https://publications.waset.org/abstracts/search?q=Fazilet%20Aksu"> Fazilet Aksu</a>, <a href="https://publications.waset.org/abstracts/search?q=Arash%20Alizadeh%20Yegani"> Arash Alizadeh Yegani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Plants provide the wealth of bioactive compounds, which exert a substantial strategy for the treatment of neurological disorders such as Alzheimer's disease. Recently, a lot of studies have explored the medicinal properties of curcumin, including antitumoral, antimicrobial, anti-inflammatory, antioxidant, antiviral, and anti-Alzheimer's disease effects. Metal complexes of curcumin (1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione) were synthesized with Mn(II) and Fe(III). The structures of synthesized metal complexes have been characterized by using spectroscopic and analytic methods such as elemental analysis, magnetic susceptibility, FT-IR, AAS, TG and argentometric titration. It was determined that the complexes have octahedral geometry. The effects of the metal complexes on the disorder of memory, which is an important symptom of Alzheimer's Disease were studied on lab rats with Plus-Maze Tests at Behavioral Pharmacology Laboratory. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=curcumin" title="curcumin">curcumin</a>, <a href="https://publications.waset.org/abstracts/search?q=Mn%28II%29" title=" Mn(II)"> Mn(II)</a>, <a href="https://publications.waset.org/abstracts/search?q=Fe%28III%29" title=" Fe(III)"> Fe(III)</a>, <a href="https://publications.waset.org/abstracts/search?q=Alzheimer%20disease" title=" Alzheimer disease"> Alzheimer disease</a>, <a href="https://publications.waset.org/abstracts/search?q=beta%20amyloid%2025-35" title=" beta amyloid 25-35"> beta amyloid 25-35</a> </p> <a href="https://publications.waset.org/abstracts/60623/synthesis-of-metal-curcumin-complexes-with-ironiii-and-manganeseii-the-effects-on-alzheimers-disease" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60623.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">301</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">382</span> Impact of the Simplification of Licensing Procedures for Industrial Complexes on Supply of Industrial Complexes and Regional Policies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seung-Seok%20Bak">Seung-Seok Bak</a>, <a href="https://publications.waset.org/abstracts/search?q=Chang-Mu%20Jung"> Chang-Mu Jung</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An enough amount supply of industrial complexes is an important national policy in South Korea, which is highly dependent on foreign trade. A development process of the industrial complex can distinguish between the planning stage and the construction stage. The planning stage consists of the process of consulting with many stakeholders on the contents of the development of industrial complex, feasibility study, compliance with the Regional policies, and so on. The industrial complex planning stage, including licensing procedure, usually takes about three years in South Korea. The government determined that the appropriate supply of industrial complexes have been delayed, due to the long licensing period and drafted a law to shorten the license period in 2008. The law was expected to shorten the period of licensing, which was about three years, to six months. This paper attempts to show that the shortening of the licensing period does not positively affect the appropriate supply of industrial complexes. To do this, we used Interrupted Time Series Designs. As a result, it was found that the supply of industrial complexes was influenced more by other factors such as actual industrial complex demand of private sector and macro-level economic variables. In addition, the specific provisions of the law conflict with local policy and cause some problems such as damage to nature and agricultural land, traffic congestion. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=development%20of%20industrial%20complexes" title="development of industrial complexes">development of industrial complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=industrial%20complexes" title=" industrial complexes"> industrial complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=interrupted%20time%20series%20designs" title=" interrupted time series designs"> interrupted time series designs</a>, <a href="https://publications.waset.org/abstracts/search?q=simplification%20of%20licensing%20procedures%20for%20industrial%20complexes" title=" simplification of licensing procedures for industrial complexes"> simplification of licensing procedures for industrial complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20series%20regression" title=" time series regression"> time series regression</a> </p> <a href="https://publications.waset.org/abstracts/66514/impact-of-the-simplification-of-licensing-procedures-for-industrial-complexes-on-supply-of-industrial-complexes-and-regional-policies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66514.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">295</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">381</span> Binding Ability of Carbazolylphenyl Dendrimers with Zinc (II) Tetraphenylporphyrin Core towards Cryptands</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Galina%20Mamardashvili">Galina Mamardashvili</a>, <a href="https://publications.waset.org/abstracts/search?q=Nugzar%20Mamardashvili"> Nugzar Mamardashvili</a>, <a href="https://publications.waset.org/abstracts/search?q=Win%20Dehaen"> Win Dehaen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The processes of complexation of the Zn-tetraarylporphyrins with eight 4-(4-(3,6-bis(t-butyl)carbazol-9-yl-phenyl)-1,2,3-triazole (ZnP1) and eight 4-(4-(3,6-di-tert-butyl-9-H-carbazol-9-yl)phenoxy)methyl)-2,4,6-trimethylphenyl (ZnP2)with the 1,10-diaza-4,7,13,18tetraoxabicyclo[8.5.5]eicosane (L1),1,10-diaza-4,7,13,16,21,24-hexaoxabicyclo[8.8.8]hexacosane (L2)and 1,10-diaza-5,6,14,15-dibenzo-4,7,13,16,21,24 hexaoxabicyclo[8.8.8] hexacosane (L3) were investigated by the method of spectrophotometric titration and <sup>1</sup>H NMR-spectroscopy. We determined the structures of the host-guest complexes, and their stability constants in toluene were calculated. It was found out that the ZnP1 interacts with the guest molecules L1, L2 with the formation of stable "nest" type complexes and does not form similar complexes with the L3 (presumably due to the fact that the L3 does not match the size of the porphyrin ZnP(1) cavity). On the other hand, the porphyrin ZnP2 binds all of the ligands L1-L3, however complexes thus formed are less stable than complexes ZnP1-L1, ZnP1-L2. In the report, we will also discuss the influence of the alkali cations additives on the stability of the complexes between the porphyrin ZnP1, ZnP2 hosts and guest molecules of the ligands L1-L3. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=porphyrin" title="porphyrin">porphyrin</a>, <a href="https://publications.waset.org/abstracts/search?q=cryptand" title=" cryptand"> cryptand</a>, <a href="https://publications.waset.org/abstracts/search?q=cation" title=" cation"> cation</a>, <a href="https://publications.waset.org/abstracts/search?q=complex%20guest-host" title=" complex guest-host"> complex guest-host</a> </p> <a href="https://publications.waset.org/abstracts/63116/binding-ability-of-carbazolylphenyl-dendrimers-with-zinc-ii-tetraphenylporphyrin-core-towards-cryptands" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63116.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">222</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">380</span> Synthetic, Characterization and Biological Studies of Bis(Tetrathiomolybdate) Compounds of Pt (II), Pd (II) and Ni (II)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20K.%20Srivastava">V. K. Srivastava</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The chemistry of compounds containing transition metals bound to sulfur containing ligands has been actively studied. Interest in these compounds arises from the identification of the biological importance of iron-sulfur containing proteins as well as the unusual behaviour of several types of synthetic metal-sulfur complexes. Metal complexes (C₆H₅)₄P)₂ Pt(Mos₄)₂, (C₆H₅)₄P)₂ Pd(MoS₄)₂, (C₆H₅)₄P)₂ Ni(MoS₄)₂ of bioinorganic relevance were investigated. The complexes [M(M'S₄)₂]²⁻ were prepared with high yield and purity as salts of the variety of organic cations. The diamagnetism and spectroscopic properties of these complexes confirmed that their structures are essentially equivalent with two bidentate M'S₄²⁻ ligands coordinated to the central d⁸ metal in a square planer geometry. The interaction of the complexes with CT-DNA was studied. Results showed that metal complexes increased DNA's relative viscosity and quench the fluorescence intensity of EB bound to DNA. In antimicrobial activities, all complexes showed good antimicrobial activity higher than ligand against gram positive, gram negative bacteria and fungi. The antitumor properties have been tested in vitro against two tumor human cell lines, Hela (derived from cervical cancer) and MCF-7 (derived from breast cancer) using metabolic activity tests. Result showed that the complexes are promising chemotherapeutic alternatives in the search of anticancer agents. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anti%20cancer" title="anti cancer">anti cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=biocidal" title=" biocidal"> biocidal</a>, <a href="https://publications.waset.org/abstracts/search?q=DNA%20binding" title=" DNA binding"> DNA binding</a>, <a href="https://publications.waset.org/abstracts/search?q=spectra" title=" spectra"> spectra</a> </p> <a href="https://publications.waset.org/abstracts/87396/synthetic-characterization-and-biological-studies-of-bistetrathiomolybdate-compounds-of-pt-ii-pd-ii-and-ni-ii" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87396.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">159</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">379</span> Drug Delivery of Cyclophosphamide Functionalized Zigzag (8,0) CNT, Armchair (4,4) CNT, and Nanocone Complexes in Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Morteza%20Keshavarz">Morteza Keshavarz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, using density functional theory (DFT) thermodynamic stability and quantum molecular descriptors of cyclophoshphamide (an anticancer drug)-functionalized zigzag (8,0) CNT, armchair (4,4) CNT and nanocone complexes in water, for two attachment namely the sidewall and tip, is considered. Calculation of the total electronic energy (Et) and binding energy (Eb) of all complexes indicates that the most thermodynamic stability belongs to the sidewall-attachment of cyclophosphamide into functional nanocone. On the other hand, results from chemical hardness show that drug-functionalized zigzag (8,0) and armchair (4,4) complexes in the tip-attachment configuration possess the smallest and greatest chemical hardness, respectively. By computing the solvation energy, it is found that the solution of the drug and all complexes are spontaneous in water. Furthermore, chirality, type of nanovector (nanotube or nanocone), or attachment configuration have no effects on solvation energy of complexes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotube" title="carbon nanotube">carbon nanotube</a>, <a href="https://publications.waset.org/abstracts/search?q=drug%20delivery" title=" drug delivery"> drug delivery</a>, <a href="https://publications.waset.org/abstracts/search?q=cyclophosphamide%20drug" title=" cyclophosphamide drug"> cyclophosphamide drug</a>, <a href="https://publications.waset.org/abstracts/search?q=density%20functional%20theory%20%28DFT%29" title=" density functional theory (DFT) "> density functional theory (DFT) </a> </p> <a href="https://publications.waset.org/abstracts/36834/drug-delivery-of-cyclophosphamide-functionalized-zigzag-80-cnt-armchair-44-cnt-and-nanocone-complexes-in-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36834.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">370</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">378</span> Chiral Diphosphine Ligands and Their Transition Metal Diphosphine Complexes in Asymmetric Catalysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shannen%20Lorraine">Shannen Lorraine</a>, <a href="https://publications.waset.org/abstracts/search?q=Paul%20Maragh"> Paul Maragh</a>, <a href="https://publications.waset.org/abstracts/search?q=Tara%20Dasgupta"> Tara Dasgupta</a>, <a href="https://publications.waset.org/abstracts/search?q=Kamaluddin%20Abdur-Rashid"> Kamaluddin Abdur-Rashid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> (R)-(4,4',6,6'-tetramethoxybiphenyl-2,2'-diyl)bis(diphenylphosphine) (R-Ph-Garphos), and (S)-(4,4',6,6'-tetramethoxybiphenyl-2,2'-diyl)bis(diphenylphosphine) (S-Ph-Garphos) are novel, nucleophilic, chiral atropisomeric ligands. The research explored the synthesis of chiral transition metal complexes containing these ligands and their applications in various asymmetric catalytic transformations. Herein, the transition metal complexes having ruthenium(II), rhodium(I) and iridium(I) metal centres will be discussed. These are air stable complexes and were characterized by CHN analysis, 1H, 13C, and 31P NMR spectroscopy, and polarimetry. Currently, there is an emphasis on 'greener' catalysts and the need for 'green' solvents in asymmetric catalysis. As such, the Ph-Garphos ligands were demethylated thereby introducing hydroxyl moieties unto the ligand scaffold. The facile tunability of the biaryl diphosphines led to the preparation of the (R)-(4,4',6,6'-tetrahydroxybiphenyl-2,2'-diyl)bis(diphenylphosphine) (R-Ph-Garphos-OH), and (S)-(4,4',6,6'-tetrahydroxybiphenyl-2,2'-diyl)bis(diphenylphosphine) (S-Ph-Garphos-OH) ligands. These were successfully characterized by CHN analysis, 1H, 13C, and 31P NMR spectroscopy, and polarimetry. The use of the Ph-Garphos and Ph-Garphos-OH ligands and their transition metal complexes in asymmetric hydrogenations will be reported. Additionally, the scope of the research will highlight the applicability of the Ph-Garphos-OH ligand and its transitional metal complexes as 'green' catalysts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=catalysis" title="catalysis">catalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=asymmetric%20hydrogenation" title=" asymmetric hydrogenation"> asymmetric hydrogenation</a>, <a href="https://publications.waset.org/abstracts/search?q=diphosphine%20transition%20metal%20complexes" title=" diphosphine transition metal complexes"> diphosphine transition metal complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=Ph-Garphos%20ligands" title=" Ph-Garphos ligands"> Ph-Garphos ligands</a> </p> <a href="https://publications.waset.org/abstracts/70174/chiral-diphosphine-ligands-and-their-transition-metal-diphosphine-complexes-in-asymmetric-catalysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70174.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">309</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">377</span> Synthesis and Spectrophotometric Study of Omeprazole Charge Transfer Complexes with Bromothymol Blue, Methyl Orange, and Picric Acid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saeeda%20Nadir%20Ali">Saeeda Nadir Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Najma%20Sultana"> Najma Sultana</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Saeed%20Arayne"> Muhammad Saeed Arayne</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Charge transfer complexes of omeprazole with bromothymol blue, methyl orange, and picric acid in the Beer’s law ranges 7-56, 6-48, and 10-80 µg mL-1, exhibiting stoichiometric ratio 1:1, and maximum wavelength 400, 420 and 373 nm respectively have been studied in aqueous medium. ICH guidelines were followed for validation study. Spectroscopic parameters including oscillator’s strength, dipole moment, ionization potential, energy of complexes, resonance energy, association constant and Gibb’s free energy changes have also been investigated and Benesi-Hildebrand plot in each case has been obtained. In addition, the methods were fruitfully employed for omeprazole determination in pharmaceutical formulations with no excipients obstruction during analysis. Solid omeprazole complexes with all the acceptors were synthesized and then structure was elucidated by IR and 1H NMR spectroscopy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=omeprazole" title="omeprazole">omeprazole</a>, <a href="https://publications.waset.org/abstracts/search?q=bromothymol%20blue" title=" bromothymol blue"> bromothymol blue</a>, <a href="https://publications.waset.org/abstracts/search?q=methyl%20orange%20and%20picric%20acid" title=" methyl orange and picric acid"> methyl orange and picric acid</a>, <a href="https://publications.waset.org/abstracts/search?q=charge%20transfer%20complexes" title=" charge transfer complexes"> charge transfer complexes</a> </p> <a href="https://publications.waset.org/abstracts/21749/synthesis-and-spectrophotometric-study-of-omeprazole-charge-transfer-complexes-with-bromothymol-blue-methyl-orange-and-picric-acid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21749.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">540</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">376</span> Local Activities of the Membranes Associated with Glycosaminoglycan-Chitosan Complexes in Bone Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chih-Chang%20Yeh">Chih-Chang Yeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Min-Fang%20Yang"> Min-Fang Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Hsin-I%20Chang"> Hsin-I Chang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Chitosan is a cationic polysaccharide derived from the partial deacetylation of chitin. Hyaluronic acid (HA), chondroitin sulfate (CS) and heparin (HP) are anionic glycosaminoglycans (GCGs) which can regulate osteogenic activity. In this study, chitosan membranes were prepared by glutaraldehyde crosslinking reaction and then complexed with three different types of GCGs. 7F2 osteoblasts-like cells and macrophages Raw264.7 were used as models to study the influence of chitosan membranes on osteometabolism. Although chitosan membranes are highly hydrophilic, the membranes associated with GCG-chitosan complexes showed about 60-70% cell attachment. Furthermore, the membranes associated with HP-chitosan complexes could increase ALP activity in comparison with chitosan films only. Three types of the membranes associated with GCG-chitosan complexes could significantly inhibit LPS induced-nitric oxide expression. In addition, chitosan membranes associated with HP and HA can down-regulate tartrate-resistant acid phosphatase (TRAP) activity but not CS-chitosan complexes. Based on these results, we conclude that chitosan membranes associated with HP can increase ALP activity in osteoblasts and chitosan membranes associated with HP and HA reduce TRAP activity in osteoclasts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=osteoblast" title="osteoblast">osteoblast</a>, <a href="https://publications.waset.org/abstracts/search?q=osteoclast" title=" osteoclast"> osteoclast</a>, <a href="https://publications.waset.org/abstracts/search?q=chitosan" title=" chitosan"> chitosan</a>, <a href="https://publications.waset.org/abstracts/search?q=glycosaminoglycan" title=" glycosaminoglycan"> glycosaminoglycan</a> </p> <a href="https://publications.waset.org/abstracts/3820/local-activities-of-the-membranes-associated-with-glycosaminoglycan-chitosan-complexes-in-bone-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3820.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">527</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">375</span> Gold–M Heterobimetallic Complexes: Synthesis and Initial Reactivity Studies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Caroline%20Alice%20Rouget-Virbel">Caroline Alice Rouget-Virbel</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Dean%20Toste"> F. Dean Toste</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Heterobimetallic systems have been precedented in a wide array of bioinorganic and heterogeneous catalytic settings, in which cooperative bond-breaking and bond-forming events mediated by neighboring metal sites have been proposed but are challenging to study and characterize. Heterodinuclear transition-metal catalysis has recently emerged as a promising strategy to tackle challenging chemical transformations, including C−C and C−X couplings as well as small molecule activation. It has been shown that these reactions can traverse nontraditional mechanisms, reactivities, and selectivities when homo- and heterobimetallic systems are employed. Moreover, stoichiometric studies of transmetallation from gold complexes have demonstrated that R transfer from PPh3–Au(I)R to Cp- and Cp*-ligated group 8/9 complexes is a viable elementary step. With these considerations in mind, we hypothesized that heterobimetallic Au–M complexes could serve as a viable and tunable catalyst platform to explore mechanisms and reactivity. In this work, heterobimetallic complexes containing Au(I) centers tethered to Ir(III) and Rh(III) piano stool moieties were synthesized and characterized. Preliminary application of these complexes to a catalytic allylic arylation reaction demonstrates bimetallic cooperativity relative to their monomeric metal components. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heterobimetallic" title="heterobimetallic">heterobimetallic</a>, <a href="https://publications.waset.org/abstracts/search?q=catalysis" title=" catalysis"> catalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=gold" title=" gold"> gold</a>, <a href="https://publications.waset.org/abstracts/search?q=rhodium" title=" rhodium"> rhodium</a> </p> <a href="https://publications.waset.org/abstracts/139787/gold-m-heterobimetallic-complexes-synthesis-and-initial-reactivity-studies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/139787.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">183</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">374</span> Femtochemistry of Iron(III) Carboxylates in Aqueous Solutions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ivan%20P.%20Pozdnyakov">Ivan P. Pozdnyakov</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexey%20A.%20Melnikov"> Alexey A. Melnikov</a>, <a href="https://publications.waset.org/abstracts/search?q=Nikolai%20V.%20Tkachenko"> Nikolai V. Tkachenko</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Photochemical reactions with participation of iron (III) carboxylates are important for environmental photochemistry and have a great potential of application in water purification (Advanced Oxidation Processes, photo-Fenton and Fenton-like processes). In spite of this information about excited states and primary intermediates in photochemistry of Fe(III) complexes with carboxylic acids is scarce. This talk presents and discusses the results of several recent authors' publications in a field of ultra fast spectroscopy of natural Fe(III) carboxylates. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carboxylates" title="carboxylates">carboxylates</a>, <a href="https://publications.waset.org/abstracts/search?q=iron%20complexes" title=" iron complexes"> iron complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=photochemistry" title=" photochemistry"> photochemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=radical%20complexes" title=" radical complexes"> radical complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrafast%20processes" title=" ultrafast processes"> ultrafast processes</a> </p> <a href="https://publications.waset.org/abstracts/26936/femtochemistry-of-ironiii-carboxylates-in-aqueous-solutions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26936.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">456</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">373</span> Synthesis, Characterization, Computational Study, Antimicrobial Evaluation, in Vivo Toxicity Study of Manganese (II) and Copper (II) Complexes with Derivative Sulfa-drug</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Afaf%20Bouchoucha">Afaf Bouchoucha</a>, <a href="https://publications.waset.org/abstracts/search?q=Karima%20Si%20Larbi"> Karima Si Larbi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Amine%20Bourouaia"> Mohamed Amine Bourouaia</a>, <a href="https://publications.waset.org/abstracts/search?q=Salah.Boulanouar"> Salah.Boulanouar</a>, <a href="https://publications.waset.org/abstracts/search?q=Safia.Djabbar"> Safia.Djabbar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The synthesis, characterization and comparative biological study of manganese (II) and copper (II) complexes with an heterocyclic ligand used in pharmaceutical field (Scheme 1), were reported. Two kinds of complexes were obtained with derivative sulfonamide, [M (L)₂ (H₂O)₂].H₂O and [M (L)₂ (Cl)₂]3H₂O. These complexes have been prepared and characterized by elemental analysis, FAB mass, ESR magnetic measurements, FTIR, UV-Visible spectra and conductivity. Their stability constants have been determined by potentiometric methods in a water-ethanol (90:10 v/v) mixture at a 0.2 mol l-1 ionic strength (NaCl) and at 25.0 ± 0.1 ºC using Sirko program. DFT calculations were done using B3LYP/6-31G(d) and B3LYP/LanL2DZ. The antimicrobial activity of ligand and complexes against the species Escherichia coli, P. aeruginosa, Klebsiella pneumoniae, S. aureus, Bacillus subtilisan, Candida albicans, Candida tropicalis, Saccharomyces, Aspergillus fumigatus and Aspergillus terreus has been carried out and compared using agar-diffusion method. Also, the toxicity study was evaluated on synchesis complexes using Mice of NMRI strain. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hetterocyclic%20ligand" title="hetterocyclic ligand">hetterocyclic ligand</a>, <a href="https://publications.waset.org/abstracts/search?q=complex" title=" complex"> complex</a>, <a href="https://publications.waset.org/abstracts/search?q=stability%20constant" title=" stability constant"> stability constant</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</a>, <a href="https://publications.waset.org/abstracts/search?q=DFT" title=" DFT"> DFT</a>, <a href="https://publications.waset.org/abstracts/search?q=acute%20and%20genotoxicity%20study" title=" acute and genotoxicity study"> acute and genotoxicity study</a> </p> <a href="https://publications.waset.org/abstracts/157973/synthesis-characterization-computational-study-antimicrobial-evaluation-in-vivo-toxicity-study-of-manganese-ii-and-copper-ii-complexes-with-derivative-sulfa-drug" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157973.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">121</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">372</span> Biomolecular Interaction of Ruthenium(II) Polypyridyl Complexes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20N.%20Harun">S. N. Harun</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Ahmad"> H. Ahmad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A series of ruthenium(II) complexes, including two novel compounds [Ru(dppz)2(L)]2+ where dppz = dipyrido-[3,2-a:2’,3’-c]phenazine, and L = 2-phenylimidazo[4,5-f][1,10]phenanthroline (PIP) or 2-(4-hydroxyphenyl)imidazo[4,5-f][1,10]phenanthroline (p-HPIP) have been synthesized and characterized. The previously reported complexes [Ru(bpy)2L]2+ and [Ru(phen)2L]2+ were also prepared. All complexes were characterized by elemental analysis, 1H-NMR spectroscopy, ESI-Mass spectroscopy and FT-IR spectroscopy. The photophysical properties were analyzed by UV-Visible spectroscopy and fluorescence spectroscopy. [Ru(dppz)2(PIP)]2+ and [Ru(dppz)2(p-HPIP)]2+ displayed ‘molecular light-switch’ effect as they have high emission in acetonitrile but no emission in water. The cytotoxicity of all complexes against cancer cell lines Hela and MCF-7 were investigated through standard MTT assay. [Ru(dppz)2(PIP)]2+ showed moderate toxicity on both MCF-7 and Hela with IC50 of 37.64 µM and 28.02 µM, respectively. Interestingly, [Ru(dppz)2(p-HPIP)]2+ exhibited remarkable cytotoxicity results with IC50 of 13.52 µM on Hela and 11.63 µM on MCF-7 cell lines which are comparable to the infamous anti-cancer drug, cisplatin. The cytotoxicity of this complex series increased as the ligands size extended in order of [Ru(bpy)2(L)]2+ < [Ru(phen)2(L)]2+ < [Ru(dppz)2(L)]2+. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ruthenium" title="ruthenium">ruthenium</a>, <a href="https://publications.waset.org/abstracts/search?q=cytotoxicity" title=" cytotoxicity"> cytotoxicity</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20light-switch" title=" molecular light-switch"> molecular light-switch</a>, <a href="https://publications.waset.org/abstracts/search?q=anticancer" title=" anticancer"> anticancer</a> </p> <a href="https://publications.waset.org/abstracts/41780/biomolecular-interaction-of-rutheniumii-polypyridyl-complexes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41780.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">307</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">371</span> Modified DNA as a Base Material for Nonlinear Optics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ewelina%20Nowak">Ewelina Nowak</a>, <a href="https://publications.waset.org/abstracts/search?q=Anna%20Wisla-Swider"> Anna Wisla-Swider</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Deoxyribonucleic acid (DNA) is a biomolecule which exhibits an electro-optic properties. These features are related with structure of double-stranded helix. Modification of DNA with ionic liquids allows intensify these properties. The aim of our study was synthesis of ionic liquids that are used the formation of DNA-surfactant complexes in order to obtain new materials with potential application for nonlinear optics. Complexes were achieved through the ion exchange reactions of carbazole-based and imidazole-based ionic liquids with H+ ions from salmon DNA. To examination the properties of obtained complexes DNA-ionic liquids there were investigated using circular dichroism (CD), UV-Vis spectra and infrared spectroscopy (IR). Additionally, the resulting DNA-surfactant complexes were characterized in terms of solubility in common organic solvents and water. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deoxyribonucleic%20acid" title="deoxyribonucleic acid">deoxyribonucleic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=biomolecule" title=" biomolecule"> biomolecule</a>, <a href="https://publications.waset.org/abstracts/search?q=carbazole" title=" carbazole"> carbazole</a>, <a href="https://publications.waset.org/abstracts/search?q=imidazole" title=" imidazole"> imidazole</a>, <a href="https://publications.waset.org/abstracts/search?q=ionic%20liquids" title=" ionic liquids"> ionic liquids</a>, <a href="https://publications.waset.org/abstracts/search?q=ion%20exchange%20reactions" title=" ion exchange reactions"> ion exchange reactions</a> </p> <a href="https://publications.waset.org/abstracts/14071/modified-dna-as-a-base-material-for-nonlinear-optics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14071.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">465</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">370</span> Synthesis, Spectroscopic and Thermal Studies of Copper(I) Chlorido Complexes of Thioureas</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Mufakkar">Muhammad Mufakkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ghulam%20Hussain%20Bhatti"> Ghulam Hussain Bhatti</a>, <a href="https://publications.waset.org/abstracts/search?q=Maryem%20Rana"> Maryem Rana</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study of the coordination behavior of thiones is of considerable interest due to the similarity of their binding sites to those in living systems. The complexation of thiones towards Copper(I) has also received considerable attraction in view of their variable bonding modes, structural diversity and promising biological implications. Copper (I) complexes of thioureas of the general formula: CuLCl, CuL2Cl and CuL3Cl [where L= Thiourea and its N- and N, N/- mono and di alkyl and phenyl derivatives] have been prepared using Cu(I)CN in the presence of HCl. The complexes have been characterized by thermal, IR and NMR(1H and 13C) spectroscopy. An upfield shift in 13C NMR and downfield shifts in 1H NMR are consistent with the sulfur coordination to Copper(I). The disappearance of a band around 2200 cm⁻¹ in IR and a resonance around 146 ppm in 13C NMR indicates that during the course of reaction the cyanide group of the Copper(I) salt has been replaced by chloride leading to the formation of chlorido complexes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thiones" title="Thiones">Thiones</a>, <a href="https://publications.waset.org/abstracts/search?q=complexation" title=" complexation"> complexation</a>, <a href="https://publications.waset.org/abstracts/search?q=spectra" title=" spectra"> spectra</a>, <a href="https://publications.waset.org/abstracts/search?q=TGA" title=" TGA"> TGA</a>, <a href="https://publications.waset.org/abstracts/search?q=thermogram" title=" thermogram"> thermogram</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20shifts" title=" chemical shifts"> chemical shifts</a>, <a href="https://publications.waset.org/abstracts/search?q=deshielding" title=" deshielding"> deshielding</a>, <a href="https://publications.waset.org/abstracts/search?q=resonance" title=" resonance"> resonance</a> </p> <a href="https://publications.waset.org/abstracts/73466/synthesis-spectroscopic-and-thermal-studies-of-copperi-chlorido-complexes-of-thioureas" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73466.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">238</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">369</span> Structure-Reactivity Relationship of Some Rhᴵᴵᴵ and Osᴵᴵᴵ Complexes with N-Inert Ligands in Ionic Liquids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jovana%20Bogojeski">Jovana Bogojeski</a>, <a href="https://publications.waset.org/abstracts/search?q=Dusan%20Cocic"> Dusan Cocic</a>, <a href="https://publications.waset.org/abstracts/search?q=Nenad%20Jankovic"> Nenad Jankovic</a>, <a href="https://publications.waset.org/abstracts/search?q=Angelina%20Petrovic"> Angelina Petrovic</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Kinetically-inert transition metal complexes, such as Rh(III) and Os(III) complexes, attract increasing attention as leading scaffolds for the development of potential pharmacological agents due to their inertness and stability. Therefore, we have designed and fully characterized a few novel rhodium(III) and osmium(III) complexes with a tridentate nitrogen−donor chelate system. For some complexes, the crystal X-ray structure analysis was performed. Reactivity of the newly synthesized complexes towards small biomolecules, such as L-methionine (L-Met), guanosine-5’-monophosphate (5’-GMP), and glutathione (GSH) has been examined. Also, the reactivity of these complexes towards the DNA/RNA (Ribonucleic acid) duplexes was investigated. Obtained results show that the newly synthesized complexes exhibit good affinity towards the studied ligands. Results also show that the complexes react faster with the RNA duplex than with the DNA and that in the DNA duplex reaction is faster with 15mer GG than with the 22mer GG. The UV-Vis (Ultraviolet-visible spectroscopy) is absorption spectroscopy, and the EB (Ethidium bromide) displacement studies were used to examine the interaction of these complexes with CT-DNA and BSA (Bovine serum albumin). All studied complex showed good interaction ability with both the DNA and BSA. Furthermore, the DFT (Density-functional theory) calculation and docking studies were performed. The impact of the metal complex on the cytotoxicity was tested by MTT assay (a colorimetric assay for assessing cell metabolic activity) on HCT-116 lines (human colon cancer cell line). In addition, all these tests were repeated in the presence of several water-soluble biologically active ionic liquids. Attained results indicate that the ionic liquids increase the activity of the investigated complexes. All obtained results in this study imply that the introduction of different spectator ligand can be used to improve the reactivity of rhodium(III) and osmium(III) complexes. Finally, these results indicate that the examined complexes show reactivity characteristics needed for potential anti-tumor agents, with possible targets being both the DNA and proteins. Every new contribution in this field is highly warranted due to the current lack of clinically used Metallo-based alternatives to cisplatin. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biomolecules" title="biomolecules">biomolecules</a>, <a href="https://publications.waset.org/abstracts/search?q=ionic%20liquids" title=" ionic liquids"> ionic liquids</a>, <a href="https://publications.waset.org/abstracts/search?q=osmium%28III%29" title=" osmium(III)"> osmium(III)</a>, <a href="https://publications.waset.org/abstracts/search?q=rhodium%28III%29" title=" rhodium(III)"> rhodium(III)</a> </p> <a href="https://publications.waset.org/abstracts/123362/structure-reactivity-relationship-of-some-rh-and-os-complexes-with-n-inert-ligands-in-ionic-liquids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123362.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">150</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=supramolecular%20complexes.&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=supramolecular%20complexes.&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=supramolecular%20complexes.&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=supramolecular%20complexes.&page=5">5</a></li> <li class="page-item"><a class="page-link" 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