{"id":10651,"date":"2012-03-22T13:38:00","date_gmt":"2012-03-22T20:38:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/a-paradigm-shift-in-understanding-chemical-reactions\/"},"modified":"2023-04-19T11:20:06","modified_gmt":"2023-04-19T18:20:06","slug":"a-paradigm-shift-in-understanding-chemical-reactions","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/a-paradigm-shift-in-understanding-chemical-reactions\/","title":{"rendered":"A Paradigm Shift in Understanding Chemical Reactions"},"content":{"rendered":"\n\n\n    \n            \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n  \n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a href=\"\/news\/stories\/\/?category=faculty\">Faculty<\/a><\/li>\n                  <\/ul>\n      <\/nav>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n  <h1>A Paradigm Shift in Understanding Chemical Reactions<\/h1>\n\n\n<\/div>\n    \n    \n           <strong class=\"author-field\"><span >By<\/span><a href=\"mailto:communication@dornsife.usc.edu\">Robert Perkins<\/a><\/strong>\n    \n          <span class=\"post-date-field\">March 22, 2012<\/span>\n      <\/div>\n<\/div>\n\n\n  <\/div><\/div>\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--social-share \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--social-share\"\n    \n      >\n\n    \n  <div class=\"content-wrapper\">\n    <span class=\"a2a_kit a2a_kit_size_32 addtoany_list\" style=\"line-height: 32px;\">\n      <span class=\"title\">\n        Share\n      <\/span>\n                        <a class=\"a2a_button_copy_link\" target=\"_blank\" 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visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n  \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p style=\"text-align: left;\">Scientists at USC and Lawrence Berkeley National Lab have discovered a  new route by which a proton (a hydrogen atom that lost its electron)  can move from one molecule to another&nbsp;&mdash; a basic component of countless  chemical and biological reactions.<\/p>\n<p>&ldquo;This is a radically new way by which proton transfer may occur,&rdquo;  said Anna Krylov, professor of chemistry in USC Dornsife. Krylov is a co-corresponding author of a  paper on the new process that was published online on March 18 by <em>Nature Chemistry<\/em>.<\/p>\n<p>Krylov and her colleagues demonstrated that protons are not obligated  to travel along hydrogen bonds, as previously believed. The finding  suggests that protons may move efficiently in stacked systems of  molecules, which are common in plant biomass, membranes, DNA and  elsewhere.<\/p>\n<p>Armed with the new knowledge, scientists may be able to better  understand chemical reactions involving catalysts, how biomass (plant  material) can be used as a renewable fuel source, how melanin (which  causes skin pigmentation) protects our bodies from the sun&rsquo;s rays and  damage to DNA.<\/p>\n<p>&ldquo;By better understanding how these processes operate at a molecular  level, scientists will be able to design new catalysts, better fuels and  more efficient drugs,&rdquo; Krylov said.<\/p>\n<p>Hydrogen atoms often are shared between two molecules, forming a  so-called hydrogen bond. This bond determines structures and properties  of everything from liquid water to the DNA double helix and proteins.<\/p>\n<p>Hydrogen bonds also serve as pathways by which protons may travel  from one molecule to another, like a road between two houses. But what  happens if there&rsquo;s no road?<\/p>\n<p>To find out, Krylov and fellow corresponding author Ahmed Musahid of  the Lawrence Berkeley National Lab created a system in which two  molecules were stacked on top of each other, without hydrogen bonds  between them. Then they ionized one of the molecules to coax a proton to  move from one place to another.<\/p>\n<p>Ahmed and Krylov discovered that when there&rsquo;s no straight road  between the two houses, the houses (molecules) can rearrange themselves  so that their front doors are close together. In that way, the proton  can travel from one to the other with no hydrogen bond and with little  energy. Then the molecules return to their original positions.<\/p>\n<p>&ldquo;We&rsquo;ve come up with the picture of a new process,&rdquo; Krylov said.<\/p>\n<p>This research was performed under the auspices of the iOpenShell  Center and supported by the U.S. Department of Energy, the Defense  Threat Reduction Agency and the National Science Foundation.<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":0,"featured_media":10654,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[271,78,96],"class_list":["post-10651","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faculty","tag-anna-krylov","tag-chemistry","tag-natural-sciences"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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