<!DOCTYPE html> <html lang="en"> <head><script type="text/javascript" src="/_static/js/bundle-playback.js?v=HxkREWBo" charset="utf-8"></script> <script type="text/javascript" src="/_static/js/wombat.js?v=txqj7nKC" charset="utf-8"></script> <script>window.RufflePlayer=window.RufflePlayer||{};window.RufflePlayer.config={"autoplay":"on","unmuteOverlay":"hidden"};</script> <script type="text/javascript" src="/_static/js/ruffle/ruffle.js"></script> <script type="text/javascript"> __wm.init("https://web.archive.org/web"); __wm.wombat("https://www.acs.org/molecule-of-the-week-old.html","20240509153528","https://web.archive.org/","web","/_static/", "1715268928"); </script> <link rel="stylesheet" type="text/css" href="/_static/css/banner-styles.css?v=S1zqJCYt" /> <link rel="stylesheet" type="text/css" href="/_static/css/iconochive.css?v=3PDvdIFv" />  <meta http-equiv="X-UA-Compatible"/> <meta charset="utf-8"/> <title></title> <meta name="viewport" content="width=device-width, initial-scale=1.0"/> <meta name="description"/> <meta name="author" content=""/> <meta name="content_id"/> <meta name="audience"/> <meta name="eventImage"/> <meta name="eventStart"/> <meta name="eventTitle"/> <meta name="eventLabel"/> <meta name="media"/> <meta name="tags"/>  <meta property="og:title"/> <meta property="og:type" content="website"/> <meta property="og:url"/> <meta property="og:description"/> <meta property="og:site_name"/> <meta property="og:image"/>  <meta name="twitter:site"/> <meta name="twitter:title"/> <meta name="twitter:description"/> <meta name="twitter:image"/> <meta http-equiv="last-modified"/> <meta http-equiv="modifiedDate"/> <link rel="preload" as="image" type="image/svg+xml" href="/web/20240509153528/https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/acs-logo.svg"/> <link rel="preload" as="font" type="font/woff2" crossorigin="crossorigin" href="https://web.archive.org/web/20240509153528/https://assets.acs.org/v3.0/acs-bootstrap/fonts/open-sans/opensans-variablefont.woff2"/> <link rel="shortcut icon" href="https://web.archive.org/web/20240509153528im_/https://assets.acs.org/v2.0/acs-bootstrap/images/favicon.ico"/> <link rel="stylesheet" type="text/css" href="https://web.archive.org/web/20240509153528cs_/https://assets.acs.org/v3.0/acs-bootstrap/css/acs-bootstrap.css"/> <link rel="stylesheet" href="/web/20240509153528cs_/https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/components.lc-a9786bd95866c3b1068a60bdcf32e44c-lc.min.css" type="text/css"> <link rel="stylesheet" type="text/css" media="print" href="/web/20240509153528cs_/https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/css/print.css"/> <script data-testid="script-acs-setup" type="text/javascript"> (function () { // setup the ACS name space window.acs = { assetDomain : 'assets.acs.org', assetUrl : 'https://web.archive.org/web/20240509153528/https://assets.acs.org/v2.0/acs-bootstrap/', jsBaseUrl : 'https://web.archive.org/web/20240509153528/https://assets.acs.org/v2.0/acs-bootstrap/js/', search : { configs : { sayt : { responderUrl : 'https://web.archive.org/web/20240509153528/https://search.acs.org/content/search/acs/en/search.sayt.json', maxGSAResults: 5, maxWsoResults: 5, saytOrder: 1 } } }, foresee : { configs: { files : 'https://web.archive.org/web/20240509153528/https://assets.acs.org/v2.0/aem/js/vendor/foresee/', replay_id : 'production' } }, page : { path : '/content/acs/en/molecule-of-the-week-old', protected : , package : '', whitelist : }, sso: { statusUrl: 'https://web.archive.org/web/20240509153528/https://sso.acs.org/idp/status', loginUrl: 'https://web.archive.org/web/20240509153528/https://www.acs.org/bin/acs/sso/login', logoutUrl: 'https://web.archive.org/web/20240509153528/https://sso.acs.org/idp/logout', localLogout: 'https://web.archive.org/web/20240509153528/https://www.acs.org/bin/acs/sso/session?action=logout', globalLogoutUrl: 'https://web.archive.org/web/20240509153528/https://sso.acs.org/idp/glogout?appid=ACSWWW', acctManagementUrl: 'https://web.archive.org/web/20240509153528/https://myaccount.acs.org/myaccount/HomePage.html', omrUrl: 'https://web.archive.org/web/20240509153528/https://www.renew.acs.org', omaUrl: 'https://web.archive.org/web/20240509153528/https://join.acs.org/eweb/ACSOMATemplate.aspx?site=ACS_OMA&WebCode=CreateAccount', acsNetworkUrl: '//web.archive.org/web/20240509153528/https://communities.acs.org/', acsNetworkOptInUrl: 'https://web.archive.org/web/20240509153528/https://acsnwoptin.acs.org/acsnwoptin/optin', acsDonateUrl: 'https://web.archive.org/web/20240509153528/https://www.acs.org/donate.html', acsDonateLandingUrl: 'https://web.archive.org/web/20240509153528/https://www.acs.org/donate.html', changeContact: 'https://web.archive.org/web/20240509153528/https://www.acs.org/help/change-your-contact-information.html', emailSubscription: 'https://web.archive.org/web/20240509153528/https://myaccount.acs.org/myaccount/EmailPreferences.html', techDivision: 'https://web.archive.org/web/20240509153528/https://myaccount.acs.org/myaccount/TechDivision.html', acsMembershipUrl: 'https://web.archive.org/web/20240509153528/https://www.acs.org/membership.html', acsMembershipBenefitsUrl: 'https://web.archive.org/web/20240509153528/https://www.acs.org/membership.html', acsStoreUrl: 'https://web.archive.org/web/20240509153528/https://www.store.acs.org', acsVolunteerUrl: 'https://web.archive.org/web/20240509153528/https://www.acs.org/volunteer.html', appid: 'ACSWWW' } }; })(); </script> </head> <body class=" " data-ishtl="true"> <div data-testid="layout-banner" class="banner acsBanner parbase"> <div data-testid="acsbanner-component">  <a href="#maincontent" aria-current="page" class="skipNavigation search-ignore">Skip to Main Content</a> <nav id="hat-menu" class="hat search-ignore" aria-label="Global Site Menu" role="navigation" data-ishtl="true"> <ul class="pubs hat__list" role="menu"> <li class="pubs__item" role="none"><a href="/web/20240509153528/https://www.acs.org/" class="pubs__link active" role="menuitem">ACS</a></li> <li class="pubs__item" role="none"><a href="https://web.archive.org/web/20240509153528/https://pubs.acs.org/" class="pubs__link" role="menuitem">Publications</a></li> <li class="pubs__item" role="none"><a href="https://web.archive.org/web/20240509153528/https://cen.acs.org/" class="pubs__link" role="menuitem">C&EN</a></li> <li class="pubs__item" role="none"><a href="https://web.archive.org/web/20240509153528/https://www.cas.org/" class="pubs__link" role="menuitem">CAS</a></li> </ul> <a class="hat__menu-back">< Back</a> <button class="hat__search-button" aria-label="Search"></button> <div id="member-menu" class="members loading-button" role="menu" aria-label="Member Menu"></div> <button class="hat__menu-button" aria-label="Main Menu"></button> </nav> </div> </div> <div data-testid="layout-header" class="header acsHeader parbase"><div data-ishtl="true" class="menu search-ignore" role="navigation" data-testid="acsheader-component"> <a href="/web/20240509153528/https://www.acs.org/" class="menu__logo"><img alt="American Chemical Society, Chemistry for Life 庐" src="/web/20240509153528im_/https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/acs-logo.svg" height="60" width="186"/></a> <nav id="main-menu" class="menu__nav" aria-label="Main Menu"> <ul class="menu__list js--menu" role="menu"> <li class="menu__item js--menu__item" role="none"> <a href="/web/20240509153528/https://www.acs.org/meetings.html" id="menu-item-0" class="menu__link" role="menuitem" aria-haspopup="true" aria-owns="menu-sub-0" aria-expanded="false">Meetings & Events</a> <div id="menu-sub-0" class="menu__sub js--menu__sub" role="group" aria-expanded="false" aria-hidden="true" aria-labelledby="menu-item-0"> <div class="menu-sub__intro"> <h4 class="menu-sub__header"><a href="/web/20240509153528/https://www.acs.org/meetings.html" class="menu-sub-header__link">Meetings & Events</a></h4> <p class="menu-sub__description">Network with colleagues and access the latest research in your field</p> </div> <div class="menu-sub__toc"> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/meetings/acs-meetings.html" class="menu-sub__link">ACS Meetings & Expositions</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/meetings/regional.html" class="menu-sub__link">Regional Meetings</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/meetings/greenchemistryconferences.html" class="menu-sub__link">Green Chemistry Conferences</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/events.html" class="menu-sub__link">Events Calendar</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/meetings/acs-meetings/about/future-meetings.html" class="menu-sub__link">Future ACS Meetings</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/meetings/programming-resources.html" class="menu-sub__link">Submit an Abstract</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/careers/leadership.html" class="menu-sub__link">Leadership Development</a></li> <li class="menu-sub__item"><a href="https://web.archive.org/web/20240509153528/https://institute.acs.org/" class="menu-sub__link">ACS Institute</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/acs-webinars.html" class="menu-sub__link">ACS Webinars</a></li> </ul> </div> <div> <a href="/web/20240509153528/https://www.acs.org/events.html" class="menu-sub__view-all">View all Meetings & Events</a> </div> <div class="menu-sub__promo"> <div class="reference parbase"><div class="cq-dd-paragraph"><div class="textimage parbase"><div data-testid="textimage-component" class="container " data-ishtl="true"> <div id="_slash_content_slash_acs_slash_en_slash_molecule-of-the-week-old" class="clearfix clean-float"> <div class="image_left image-div" style="width: 944px;"> <a href="/web/20240509153528/https://www.acs.org/meetings/acs-meetings/fall.html"> <div class="image" id="cq-textimage-jsp-/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage"> <img class="cq-dd-image" alt="ACS Fall 2024, Denver, Colorado, August 17-22, 2024" width="944" loading="lazy" srcset="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage/image.scale.small.1024.jpg/1712951528982.jpg 472w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage/image.scale.medium.1399.jpg/1712951528982.jpg 629w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage/image.scale.large.1600.jpg/1712951528982.jpg 944w" sizes="(min-width: 1344px) 944px, (min-width: 768px) 629px, (max-width: 767px) 472px" src="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/_jcr_content/articleContent/textimage/image.scale.medium.1399.jpg/1712951528982.jpg"/> </div> </a> <div class="image-info"> </div> </div> <div class="text cq-dd-image clear"><p><b><a href="/web/20240509153528/https://www.acs.org/meetings/acs-meetings/fall.html">ACS Fall 2024</a><br/> </b><small>Denver, CO & Hybrid</small><br/> <small>August 18-22, 2024</small><br/> </p> </div> </div> </div> </div> </div> </div> </div> </div> </li> <li class="menu__item js--menu__item" role="none"> <a href="/web/20240509153528/https://www.acs.org/careers.html" id="menu-item-1" class="menu__link" role="menuitem" aria-haspopup="true" aria-owns="menu-sub-1" aria-expanded="false">Careers</a> <div id="menu-sub-1" class="menu__sub js--menu__sub" role="group" aria-expanded="false" aria-hidden="true" aria-labelledby="menu-item-1"> <div class="menu-sub__intro"> <h4 class="menu-sub__header"><a href="/web/20240509153528/https://www.acs.org/careers.html" class="menu-sub-header__link">Careers</a></h4> <p class="menu-sub__description">Launch and grow your career with career services and resources</p> </div> <div class="menu-sub__toc"> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/careers/developing-growing-in-your-career.html" class="menu-sub__link">Develop and grow in your career</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/careers/finding-landing-a-job.html" class="menu-sub__link">Find and land a job</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/careers/exploring-career-options.html" class="menu-sub__link">Explore career options</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/careers/finding-networking-opportunities.html" class="menu-sub__link">Find networking opportunities</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/careers/chemical-sciences.html" class="menu-sub__link">Careers & the Chemical Sciences</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/careers/personal-career-consulting.html" class="menu-sub__link">Virtual Career Services</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="https://web.archive.org/web/20240509153528/https://institute.acs.org/" class="menu-sub__link">ACS Institute</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/get-experience.html" class="menu-sub__link">Get Experience</a></li> </ul> </div> <div> <a href="/web/20240509153528/https://www.acs.org/careers.html" class="menu-sub__view-all">View all Careers</a> </div> <div class="menu-sub__promo"> <div class="reference parbase"><div class="cq-dd-paragraph"><div class="textimage parbase"><div data-testid="textimage-component" class="container " data-ishtl="true"> <div id="_slash_content_slash_acs_slash_en_slash_molecule-of-the-week-old" class="clearfix clean-float"> <div class="image_left image-div" style="width: 260px;"> <a href="/web/20240509153528/https://www.acs.org/careers.html"> <div class="image" id="cq-textimage-jsp-/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy"> <img class="cq-dd-image" alt="Explore Career Options" width="260" loading="lazy" srcset="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy/image.scale.small.1024.jpg/1708704680529.jpg 130w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy/image.scale.medium.1399.jpg/1708704680529.jpg 173w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy/image.scale.large.1600.jpg/1708704680529.jpg 260w" sizes="(min-width: 1344px) 260px, (min-width: 768px) 173px, (max-width: 767px) 130px" src="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/_jcr_content/articleContent/textimage_copy/image.scale.medium.1399.jpg/1708704680529.jpg"/> </div> </a> <div class="image-info"> </div> </div> <div class="text cq-dd-image clear"><p><b><a href="/web/20240509153528/https://www.acs.org/careers.html">Explore Career Options</a></b><br/> <small>Let ACS help you navigate your career journey with tools, personal coaching and networking.</small></p> </div> </div> </div> </div> </div> </div> </div> </div> </li> <li class="menu__item js--menu__item" role="none"> <a href="/web/20240509153528/https://www.acs.org/education.html" id="menu-item-2" class="menu__link" role="menuitem" aria-haspopup="true" aria-owns="menu-sub-2" aria-expanded="false">Students & Educators</a> <div id="menu-sub-2" class="menu__sub js--menu__sub" role="group" aria-expanded="false" aria-hidden="true" aria-labelledby="menu-item-2"> <div class="menu-sub__intro"> <h4 class="menu-sub__header"><a href="/web/20240509153528/https://www.acs.org/education.html" class="menu-sub-header__link">Students & Educators</a></h4> <p class="menu-sub__description">Promoting excellence in science education and outreach</p> </div> <div class="menu-sub__toc"> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/resources.html" class="menu-sub__link">Educational Resources</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/students.html" class="menu-sub__link">For Students</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/educators.html" class="menu-sub__link">For Educators</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/whatischemistry.html" class="menu-sub__link">Explore Chemistry</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/policies.html" class="menu-sub__link">Standards & Guidelines</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/outreach.html" class="menu-sub__link">Science Outreach</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/books-and-magazines.html" class="menu-sub__link">Books & Magazines</a></li> <li class="menu-sub__item"><a href="https://web.archive.org/web/20240509153528/https://teachchemistry.org/" class="menu-sub__link">American Association of Chemistry Teachers</a></li> </ul> </div> <div> <a href="/web/20240509153528/https://www.acs.org/education.html" class="menu-sub__view-all">View all Students & Educators</a> </div> <div class="menu-sub__promo"> <div class="reference parbase"><div class="cq-dd-paragraph"><div class="textimage parbase"><div data-testid="textimage-component" class="container " data-ishtl="true"> <div id="_slash_content_slash_acs_slash_en_slash_molecule-of-the-week-old" class="clearfix clean-float"> <div class="image_left image-div" style="width: 237px;"> <a href="/web/20240509153528/https://www.acs.org/education/educators/acs-hach-programs.html"> <div class="image" id="cq-textimage-jsp-/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy__511627432"> <img class="cq-dd-image" alt="ACS-Hach Programs" width="237" loading="lazy" srcset="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy__511627432/image.img.png/1708704842592.png 119w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy__511627432/image.img.png/1708704842592.png 158w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy__511627432/image.img.png/1708704842592.png 237w" sizes="(min-width: 1344px) 237px, (min-width: 768px) 158px, (max-width: 767px) 119px" src="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/_jcr_content/articleContent/textimage_copy_copy__511627432/image.img.png/1708704842592.png"/> </div> </a> <div class="image-info"> </div> </div> <div class="text cq-dd-image clear"><p><b><a href="/web/20240509153528/https://www.acs.org/education/educators/acs-hach-programs.html">ACS-Hach Programs</a></b><br/> <small>Learn about financial support for future and current high school chemistry teachers.</small></p> </div> </div> </div> </div> </div> </div> </div> </div> </li> <li class="menu__item js--menu__item" role="none"> <a href="/web/20240509153528/https://www.acs.org/membership-and-networks.html" id="menu-item-3" class="menu__link" role="menuitem" aria-haspopup="true" aria-owns="menu-sub-3" aria-expanded="false">Communities</a> <div id="menu-sub-3" class="menu__sub js--menu__sub" role="group" aria-expanded="false" aria-hidden="true" aria-labelledby="menu-item-3"> <div class="menu-sub__intro"> <h4 class="menu-sub__header"><a href="/web/20240509153528/https://www.acs.org/membership-and-networks.html" class="menu-sub-header__link">Communities</a></h4> <p class="menu-sub__description">Find a chemistry community of interest and connect on a local and global level.</p> </div> <div class="menu-sub__toc"> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/technical-divisions.html" class="menu-sub__link">Technical Divisions</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/local-sections.html" class="menu-sub__link">Local Sections</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/industry.html" class="menu-sub__link">Industry Resources</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/global/chapters.html" class="menu-sub__link">International Chapters</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/global.html" class="menu-sub__link">International Resources</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/greenchemistry/industry-roundtables.html" class="menu-sub__link">Green Chemistry Roundtables</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/membership-and-networks/senior-chemists.html" class="menu-sub__link">Senior Chemists</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/students/college/studentaffiliates.html" class="menu-sub__link">Student Chapters</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/students/highschool/chemistryclubs.html" class="menu-sub__link">High School Club</a></li> <li class="menu-sub__item"><a href="https://web.archive.org/web/20240509153528/https://acswcc.org/" class="menu-sub__link">Women Chemists</a></li> </ul> </div> <div> <a href="/web/20240509153528/https://www.acs.org/membership-and-networks.html" class="menu-sub__view-all">View all Communities</a> </div> <div class="menu-sub__promo"> <div class="reference parbase"><div class="cq-dd-paragraph"><div class="textimage parbase"><div data-testid="textimage-component" class="container " data-ishtl="true"> <div id="_slash_content_slash_acs_slash_en_slash_molecule-of-the-week-old" class="clearfix clean-float"> <div class="image_left image-div" style="width: 236px;"> <a href="/web/20240509153528/https://www.acs.org/technical-divisions.html"> <div class="image" id="cq-textimage-jsp-/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy_1248650693"> <img class="cq-dd-image" alt="Technical Divisions" width="236" loading="lazy" srcset="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy_1248650693/image.scale.small.1024.jpg/1708704727874.jpg 118w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy_1248650693/image.scale.medium.1399.jpg/1708704727874.jpg 157w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy_1248650693/image.scale.large.1600.jpg/1708704727874.jpg 236w" sizes="(min-width: 1344px) 236px, (min-width: 768px) 157px, (max-width: 767px) 118px" src="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/_jcr_content/articleContent/textimage_copy_copy_1248650693/image.scale.medium.1399.jpg/1708704727874.jpg"/> </div> </a> <div class="image-info"> </div> </div> <div class="text cq-dd-image clear"><p><b><a href="/web/20240509153528/https://www.acs.org/technical-divisions.html">Technical Divisions</a></b><br/> <small>Collaborate with scientists in your field of chemistry and stay current in your area of specialization.</small></p> </div> </div> </div> </div> </div> </div> </div> </div> </li> <li class="menu__item js--menu__item" role="none"> <a href="/web/20240509153528/https://www.acs.org/pressroom.html" id="menu-item-4" class="menu__link" role="menuitem" aria-haspopup="true" aria-owns="menu-sub-4" aria-expanded="false">Discover Chemistry</a> <div id="menu-sub-4" class="menu__sub js--menu__sub" role="group" aria-expanded="false" aria-hidden="true" aria-labelledby="menu-item-4"> <div class="menu-sub__intro"> <h4 class="menu-sub__header"><a href="/web/20240509153528/https://www.acs.org/pressroom.html" class="menu-sub-header__link">Discover Chemistry</a></h4> <p class="menu-sub__description">Explore the interesting world of science with articles, videos and more.</p> </div> <div class="menu-sub__toc"> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/pressroom/presspacs.html" class="menu-sub__link">Science Articles</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/acs-webinars.html" class="menu-sub__link">ACS Webinars</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/greenchemistry.html" class="menu-sub__link">Green Chemistry</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/chemical-safety.html" class="menu-sub__link">Safety</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/pressroom/tiny-matters.html" class="menu-sub__link">Tiny Matters Podcast</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/pressroom/newsreleases.html" class="menu-sub__link">News Releases</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/pressroom/reactions.html" class="menu-sub__link">Reactions Videos</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/education/whatischemistry/landmarks.html" class="menu-sub__link">Landmarks in Chemical History</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/pressroom/reactions/infographics.html" class="menu-sub__link">Infographics</a></li> </ul> </div> <div> <a href="/web/20240509153528/https://www.acs.org/pressroom.html" class="menu-sub__view-all">View all Discover Chemistry</a> </div> <div class="menu-sub__promo"> <div class="reference parbase"><div class="cq-dd-paragraph"><div class="textimage parbase"><div data-testid="textimage-component" class="container " data-ishtl="true"> <div id="_slash_content_slash_acs_slash_en_slash_molecule-of-the-week-old" class="clearfix clean-float"> <div class="image_left image-div" style="width: 236px;"> <a href="/web/20240509153528/https://www.acs.org/pressroom/reactions.html"> <div class="image" id="cq-textimage-jsp-/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy_788906651"> <img class="cq-dd-image" alt="Chemistry Science Videos & Infographics" width="236" loading="lazy" srcset="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy_788906651/image.img.png/1708704769876.png 118w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy_788906651/image.img.png/1708704769876.png 157w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy_788906651/image.img.png/1708704769876.png 236w" sizes="(min-width: 1344px) 236px, (min-width: 768px) 157px, (max-width: 767px) 118px" src="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/_jcr_content/articleContent/textimage_copy_copy_788906651/image.img.png/1708704769876.png"/> </div> </a> <div class="image-info"> </div> </div> <div class="text cq-dd-image clear"><p><b><a href="/web/20240509153528/https://www.acs.org/pressroom/reactions.html">Reactions: Chemistry Science Videos & Infographics</a></b><br/> <small>Uncover the Chemistry in Everyday Life</small></p> </div> </div> </div> </div> </div> </div> </div> </div> </li> <li class="menu__item js--menu__item" role="none"> <a href="/web/20240509153528/https://www.acs.org/funding.html" id="menu-item-5" class="menu__link" role="menuitem" aria-haspopup="true" aria-owns="menu-sub-5" aria-expanded="false">Funding & Awards</a> <div id="menu-sub-5" class="menu__sub js--menu__sub" role="group" aria-expanded="false" aria-hidden="true" aria-labelledby="menu-item-5"> <div class="menu-sub__intro"> <h4 class="menu-sub__header"><a href="/web/20240509153528/https://www.acs.org/funding.html" class="menu-sub-header__link">Funding & Awards</a></h4> <p class="menu-sub__description">Celebrating and advancing your work with awards, grants, fellowships & scholarships.</p> </div> <div class="menu-sub__toc"> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/awards.html" class="menu-sub__link">Awards</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/grants.html" class="menu-sub__link">Grants</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/scholarships-fellowships.html" class="menu-sub__link">Scholarships & Fellowships</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/awards/national.html" class="menu-sub__link">National Awards</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/grants/petroleum-research-fund.html" class="menu-sub__link">Petroleum Research Fund</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/industry.html" class="menu-sub__link">Industry Awards</a></li> </ul> <ul class="menu-sub__list js--menu-sub__list"> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/green-chemistry.html" class="menu-sub__link">Green Chemistry</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/local-sections.html" class="menu-sub__link">Local Sections</a></li> <li class="menu-sub__item"><a href="/web/20240509153528/https://www.acs.org/funding/technical-divisions.html" class="menu-sub__link">Technical Divisions</a></li> </ul> </div> <div> <a href="/web/20240509153528/https://www.acs.org/funding.html" class="menu-sub__view-all">View all Funding & Awards</a> </div> <div class="menu-sub__promo"> <div class="reference parbase"><div class="cq-dd-paragraph"><div class="textimage parbase"><div data-testid="textimage-component" class="container " data-ishtl="true"> <div id="_slash_content_slash_acs_slash_en_slash_molecule-of-the-week-old" class="clearfix clean-float"> <div class="image_left image-div" style="width: 237px;"> <a href="/web/20240509153528/https://www.acs.org/funding/awards/chemluminary.html"> <div class="image" id="cq-textimage-jsp-/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy__1778912246"> <img class="cq-dd-image" alt="ACS-Hach Programs" width="237" loading="lazy" srcset="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy__1778912246/image.scale.small.1024.jpg/1708704811875.jpg 119w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy__1778912246/image.scale.medium.1399.jpg/1708704811875.jpg 158w, /web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/jcr:content/articleContent/textimage_copy_copy__1778912246/image.scale.large.1600.jpg/1708704811875.jpg 237w" sizes="(min-width: 1344px) 237px, (min-width: 768px) 158px, (max-width: 767px) 119px" src="/web/20240509153528im_/https://www.acs.org/content/acs/en/features/megamenu-promo/_jcr_content/articleContent/textimage_copy_copy__1778912246/image.scale.medium.1399.jpg/1708704811875.jpg"/> </div> </a> <div class="image-info"> </div> </div> <div class="text cq-dd-image clear"><p><b><a href="/web/20240509153528/https://www.acs.org/funding/awards/chemluminary.html">ChemLuminary Awards</a></b><br/> <small>Recognizing ACS local sections, divisions and other volunteers for their work in promoting chemistry.</small></p> </div> </div> </div> </div> </div> </div> </div> </div> </li> <li class="menu__item menu__no-sub js--menu__item" role="none"><a href="/web/20240509153528/https://www.acs.org/about.html" class="menu__link" role="menuitem">About ACS</a></li> <li class="menu__item menu__no-sub js--menu__item" role="none"><a href="/web/20240509153528/https://www.acs.org/membership.html" class="menu__link" role="menuitem">Membership</a></li> <li class="menu__item menu__no-sub js--menu__item" role="none"><a href="/web/20240509153528/https://www.acs.org/greenchemistry.html" class="menu__link" role="menuitem">Green Chemistry</a></li> <li class="menu__item menu__no-sub js--menu__item" role="none"><a href="/web/20240509153528/https://www.acs.org/chemical-safety.html" class="menu__link" role="menuitem">Chemical & Laboratory Safety</a></li> <li class="menu__item menu__no-sub js--menu__item" role="none"><a href="/web/20240509153528/https://www.acs.org/donate.html" class="menu__link" role="menuitem">Donate</a></li> <li class="menu__item menu__no-sub js--menu__item" role="none"><a href="/web/20240509153528/https://www.acs.org/volunteer.html" class="menu__link" role="menuitem">Volunteer</a></li> </ul> </nav> <a href="https://web.archive.org/web/20240509153528/https://www.acs.org/membership.html" class="menu__join">Membership</a> <div id="search"> <div class="search acsSearch parbase"> <form action="https://web.archive.org/web/20240509153528/https://search.acs.org/" data-testid="acssearch-component" method="get" role="search" class="search-form"> <button class="search-form__close" type="reset" aria-label="Close Search"></button> <input type="text" name="q" id="searchsite" class="search-form__input" title="Enter keywords to search" placeholder="Search" aria-label="Enter keywords to search" aria-labelledby="search-button"/> <button id="search-button" class="search-form__button" role="button" aria-label="Submit Search"></button> </form> </div> </div> </div>  </div> <div data-testid="layout-globalbanner"> </div>  <div data-ishtl="true" id="bd" role="main" data-testid="layout-maincontent"> <div class="container-fluid"> <div class="row"> <div class="col-md-12"> <div class="acsBreadcrumb breadcrumbNav parbase">  <div class="container" data-testid="breadcrumbnav-component"> <div class="breadcrumb search-ignore"> <ul arial-label="Breadcrumb"> <li class="hiddenButRead first"><strong>You are here:</strong></li> <li class="breadcrumb-item-2 first"> <a href="/web/20240509153528/https://www.acs.org/"> American Chemical Society </a> </li> </ul> </div> </div>  </div> <div class="articleContent parsys"> <div class="embed"> <div data-testid="embed-component" id="aem-embed-jsp-/content/acs/en/system/404/jcr:content/articleContent/embed" class="embed left" style="height:auto; width:auto; " data-ishtl="true"> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://web.archive.org/web/20240509153528cs_/https://fonts.googleapis.com/css?family=Titillium+Web:600&display=swap" rel="stylesheet"> <link rel="stylesheet" type="text/css" href="/web/20240509153528cs_/https://www.acs.org/content/dam/acsorg/system/404/main.css"> </head> <body> <section> <div id="container"> <div id="title" data-tilt data-tilt-scale="1.1"> <p>4</p> <span id="atom"></span> <noscript> <img src="/web/20240509153528im_/https://www.acs.org/content/dam/acsorg/system/404/atom.svg"/> </noscript> <p>4</p> </div> <div id="error"> <h1>Uh-oh, this page must have lost an electron!</h1> <p>But we're not positive... Try the following links instead.</p> </div> </div> </section> <section id="extra"> <div id="txt">Helpful Links</div> <div id="rect"></div> <div id="line"></div> <div class="links"> <a class="btn-link btn" href="/web/20240509153528/https://www.acs.org/meetings/acs-meetings.html">ACS Meetings</a> <a class="btn-link btn" href="/web/20240509153528/https://www.acs.org/acs-webinars.html">ACS Webinars</a> <a class="btn-link btn" href="/web/20240509153528/https://www.acs.org/careers/chemical-sciences.html">Careers & the Chemical Sciences</a> <a class="btn-link btn" href="/web/20240509153528/https://www.acs.org/education/resources/highschool/chemmatters.html">ChemMatters</a> <a class="btn-link btn" href="/web/20240509153528/https://www.acs.org/about/governance/committees.html">Committees</a> <a class="btn-link btn" href="/web/20240509153528/https://www.acs.org/contact.html">Contact Us</a> <a class="btn-link btn" href="https://web.archive.org/web/20240509153528/https://proed.acs.org/content/proed/en.html">Professional Education</a> <a class="btn-link btn" href="/web/20240509153528/https://www.acs.org/sitemap.html">Site Map</a> </div> </section> <script src="/web/20240509153528js_/https://www.acs.org/content/dam/acsorg/system/lottie_light.min.js"></script> <script type="text/javascript"> var animation = lottie.loadAnimation({ container: document.getElementById("atom"), renderer: 'svg', load: true, autoplay: true, loop: true, path: '/content/dam/acsorg/system/404/data.json' }) </script> <script type="text/javascript" src="/web/20240509153528js_/https://www.acs.org/content/dam/acsorg/system/vanilla-tilt.min.js"></script> </body> <div class="clear"></div> </div> </div> </div> </div> </div> </div> </div>  <div data-testid="layout-cookiebanner"> <div data-testid="cookiebanner-component" class="alert-banner__cookie disabled search-ignore"> <div class="container"> <p> <button class="cookie-consent" data-testid="cookie-consent-button">Accept & Close</button> The ACS takes your privacy seriously as it relates to cookies. We use cookies to remember users, better understand ways to serve them, improve our value proposition, and optimize their experience. Learn more about managing your cookies at <a href="/web/20240509153528/https://www.acs.org/content/acs/en/cookies.html">Cookies Policy</a>. </p> </div> </div> </div> <div data-testid="layout-footer" class="footer acsFooter parbase">  <div data-testid="acsfooter-component" id="ft" class="search-ignore extended" role="contentinfo"> <div class="container"> <div id="ft-sitemap"> <div class="sitemap-col"> <a href="/web/20240509153528/https://www.acs.org/" class="footer__logo"><img alt="American Chemical Society, Chemistry for Life" loading="lazy" src="/web/20240509153528im_/https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/acs-logo-white.svg" width="175" height="56"/></a> </div> <div class="sitemap-col"> <dl data-testid="acsfooterlinklist-component" class="sitemap-cat"> <dt>GET TO KNOW US</dt> <dd><a href="/web/20240509153528/https://www.acs.org/about.html?sc=180808_GlobalFooter_od">About ACS</a></dd> <dd><a href="/web/20240509153528/https://www.acs.org/pressroom/news-room.html?sc=180808_GlobalFooter_od">Press Room</a></dd> <dd><a href="https://web.archive.org/web/20240509153528/https://jobs.acs.org/?utm_source=careersite">Jobs at ACS</a></dd> <dd><a href="/web/20240509153528/https://www.acs.org/about/governance.html?sc=180808_GlobalFooter_od">Governance</a></dd> <dd><a href="https://web.archive.org/web/20240509153528/https://www.store.acs.org/?sc=180808_GlobalFooter_od">ACS Store</a></dd> </dl> </div> <div class="sitemap-col"> <dl data-testid="acsfooterlinklist-component" class="sitemap-cat"> <dt>JOIN US</dt> <dd><a href="https://web.archive.org/web/20240509153528/https://membership.join.acs.org/?sc=190101_GlobalFooter_od">Join ACS</a></dd> <dd><a href="https://web.archive.org/web/20240509153528/https://membership.renew.acs.org/?sc=190101_GlobalFooter_od">Renew Membership</a></dd> <dd><a href="https://web.archive.org/web/20240509153528/https://www.acs.org/membership.html">Member Benefits</a></dd> </dl> </div> <div class="sitemap-col"> <dl data-testid="acsfooterlinklist-component" class="sitemap-cat"> <dt>GET INVOLVED</dt> <dd><a href="/web/20240509153528/https://www.acs.org/policy.html">Advocate</a></dd> <dd><a href="/web/20240509153528/https://www.acs.org/volunteer.html">Volunteer</a></dd> <dd><a href="/web/20240509153528/https://www.acs.org/donate.html">Donate</a></dd> <dd><a href="https://web.archive.org/web/20240509153528/https://communities.acs.org/">ACS Network</a></dd> </dl> </div> <div class="sitemap-col"> <div class="footer__title">Follow Us</div> <div class="ft-social-links"> <a href="https://web.archive.org/web/20240509153528/https://www.facebook.com/AmericanChemicalSociety" class="social-icon facebook" aria-label="Follow us on Facebook"></a> <a href="https://web.archive.org/web/20240509153528/https://twitter.com/AmerChemSociety" class="social-icon twitter" aria-label="Follow us on Twitter"></a> <a href="https://web.archive.org/web/20240509153528/https://www.linkedin.com/company/american-chemical-society" class="social-icon linkedin" aria-label="Follow us on LinkedIn"></a> <a href="https://web.archive.org/web/20240509153528/https://www.instagram.com/amerchemsociety/?hl=en" class="social-icon instagram" aria-label="Follow us on Instagram"></a> </div> </div> </div> <div class="ft-acs-address"><div data-testid="text-component" class="container " data-ishtl="true"> <div> <p>1155 Sixteenth Street, NW, Washington, DC 20036, USA |聽<a href="https://web.archive.org/web/20240509153528/mailto:service@acs.org">service@acs.org</a>聽|聽1-800-333-9511 (US and Canada) | 614-447-3776 (outside North America)</p> </div> </div></div> </div> <div class="ft-links"> <div class="container"> <ul> <li><a href="#top">Top ^</a></li> <li><a href="/web/20240509153528/https://www.acs.org/terms.html">Terms of Use</a></li> <li><a href="/web/20240509153528/https://www.acs.org/security.html">Security</a></li> <li><a href="/web/20240509153528/https://www.acs.org/privacy.html">Privacy</a></li> <li><a href="/web/20240509153528/https://www.acs.org/accessibility-statement.html">Accessibility</a></li> <li><a href="/web/20240509153528/https://www.acs.org/sitemap.html">Site Map</a></li> <li><a href="/web/20240509153528/https://www.acs.org/contact.html">Contact</a></li> <li><a href="/web/20240509153528/https://www.acs.org/help.html">Help</a></li> </ul> <p><a href="/web/20240509153528/https://www.acs.org/copyright.html">Copyright ©</a> 2024 American Chemical Society</p> </div> </div> </div>   </div> <script data-testid="js-analytics" type="text/javascript"> (function() { window.pagedata = {"gated":"Non Gated","path":"/content/acs/en/molecule-of-the-week-old","gatedType":"","omniHier1":null,"omniSubSection3":null,"omniPageName":"null:molecule-of-the-week-old","omniSubSection2":null,"title":null,"omniSubSection1":null,"omniDomain":"www.acs.org","omniContentId":"","omniChannel":null}; }()) </script>  <script src="https://web.archive.org/web/20240509153528js_/https://assets.acs.org/v2.0/acs-bootstrap/js/acs.min.js"></script> <script src="/web/20240509153528js_/https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/components.lc-f5d4fac415dc576788dbe6ca972bcfcb-lc.min.js"></script> <script>  (function() { window._prum = [['id', '5182d37babe53d3b66000000'], ['mark', 'firstbyte', (new Date()).getTime()]]; var s = document.getElementsByTagName('script')[0] , p = document.createElement('script'); p.async = 'async'; p.src = '//web.archive.org/web/20240509153528/https://rum-static.pingdom.net/prum.min.js'; s.parentNode.insertBefore(p, s); })(); </script>   <script async="async" src="//web.archive.org/web/20240509153528js_/https://assets.adobedtm.com/822408db7b4a/f9e889f09bf1/launch-758c59e3763b.min.js"></script> <div class="cloudservices servicecomponents"> </div> </body> </html>

CINXE.COM