Study of Lanthanoide Organic Frameworks Properties and Synthesis: Multicomponent Ligands

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Frameworks Properties and Synthesis: Multicomponent Ligands</title> <meta name="description" content="Study of Lanthanoide Organic Frameworks Properties and Synthesis: Multicomponent Ligands"> <meta name="keywords" content="isostructural, lanthanoids, lanthanoids organic frameworks (LOFs), metal organic frameworks (MOFs), thermogravimetry, X-Ray diffraction"> <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 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87408</div> </div> </div> </div> <div class="card publication-listing mt-3 mb-3"> <h5 class="card-header" style="font-size:.9rem">Study of Lanthanoide Organic Frameworks Properties and Synthesis: Multicomponent Ligands</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ayla%20Roberta%20Galaco">Ayla Roberta Galaco</a>, <a href="https://publications.waset.org/abstracts/search?q=Juliana%20Fonseca%20De%20Lima"> Juliana Fonseca De Lima</a>, <a href="https://publications.waset.org/abstracts/search?q=Osvaldo%20Antonio%20Serra"> Osvaldo Antonio Serra</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Coordination polymers, also known as metal-organic frameworks (MOFs) or lanthanoide organic frameworks (LOFs) have been reported due of their promising applications in gas storage, separation, catalysis, luminescence, magnetism, drug delivery, and so on. As a type of organic鈥搃norganic hybrid materials, the properties of coordination polymers could be chosen by deliberately selecting the organic and inorganic components. LOFs have received considerable attention because of their properties such as porosity, luminescence, and magnetism. Methods such as solvothermal synthesis are important as a strategy to control the structural and morphological properties as well as the composition of the target compounds. In this work the first solvothermal synthesis was employed to obtain the compound [Y0.4,Yb0.4,Er0.2(dmf)(for)(H2O)(tft)], by using terephthalic acid (tft) and oxalic acid, decomposed in formate (for), as ligands; Yttrium, Ytterbium and, Erbium as metal centers, in DMF and water for 4 days under 160 掳C. The semi-rigid terephthalic acid (dicarboxylic) coordinates with Ln3+ ions and also is possible to form a polyfunctional bridge. On the other hand, oxalate anion has no high-energy vibrational groups, which benefits the excitation of Yb3+ in upconversion process. It was observed that the compounds with water molecules in the coordination sphere of the lanthanoide ions cause lower crystalline properties and change the structure of the LOF (1D, 2D, 3D). In the FTIR, the bands at 1589 and 1500 cm-1 correspond to the asymmetric stretching vibration of 鈥揅OO. The band at 1383 cm-1 is assigned to the symmetric stretching vibration of 鈥揅OO. Single crystal X-ray diffraction study reveals an infinite 3D coordination framework that crystalizes in space group P21/c. The other three products, [TR(chel)(ofd)0,5(H2O)2], where TR= Eu3+, Y3, and Yb3+/Er3+ were obtained by using 1, 2-phenylenedioxydiacetic acid (ofd) and chelidonic acid (chel) as organic ligands. Thermal analysis shows that the lanthanoide organic frameworks do not collapse at temperatures below 250 掳C. By the polycrystalline X-ray diffraction patterns (PXRD) it was observed that the compounds with Eu3+, Y3+, and Yb3+/Er3+ ions are isostructural. From PXRD patterns, high crystallinity can be noticed for the complexes. The final products were characterized by single X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS) and thermogravimetric analysis (TGA). The X-ray diffraction (XRD) is an effective method to investigate crystalline properties of synthesized materials. The solid crystal obtained in the synthesis show peaks at 2胃 < 10掳, indicating the MOF formation. The chemical composition of LOFs was also confirmed by EDS. <iframe src="https://publications.waset.org/abstracts/65646.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=isostructural" title="isostructural">isostructural</a>, <a href="https://publications.waset.org/abstracts/search?q=lanthanoids" title=" lanthanoids"> lanthanoids</a>, <a href="https://publications.waset.org/abstracts/search?q=lanthanoids%20organic%20frameworks%20%28LOFs%29" title=" lanthanoids organic frameworks (LOFs)"> lanthanoids organic frameworks (LOFs)</a>, <a href="https://publications.waset.org/abstracts/search?q=metal%20organic%20frameworks%20%20%28MOFs%29" title=" metal organic frameworks (MOFs)"> metal organic frameworks (MOFs)</a>, <a href="https://publications.waset.org/abstracts/search?q=thermogravimetry" title=" thermogravimetry"> thermogravimetry</a>, <a href="https://publications.waset.org/abstracts/search?q=X-Ray%20diffraction" title=" X-Ray diffraction"> X-Ray diffraction</a> </p> <a href="https://publications.waset.org/abstracts/65646/study-of-lanthanoide-organic-frameworks-properties-and-synthesis-multicomponent-ligands" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65646.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">260</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" 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Study of Lanthanoide Organic Frameworks Properties and Synthesis: Multicomponent Ligands