{"id":36097,"date":"2019-03-13T13:26:47","date_gmt":"2019-03-13T12:26:47","guid":{"rendered":"https:\/\/aktuelles.uni-frankfurt.de\/?p=36097"},"modified":"2023-02-22T18:15:28","modified_gmt":"2023-02-22T17:15:28","slug":"physics-laser-light-determines-chirality-of-molecules","status":"publish","type":"post","link":"https:\/\/aktuelles.uni-frankfurt.de\/en\/english\/physics-laser-light-determines-chirality-of-molecules\/","title":{"rendered":"Physics \/ Laser light determines chirality of molecules"},"content":{"rendered":"<figure id=\"attachment_36073\" aria-describedby=\"caption-attachment-36073\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-36073\" src=\"https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2019\/03\/PM-D\u00f6rner-Bild-und-Spiegelbild.png\" alt=\"\" width=\"750\" height=\"277\" srcset=\"https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2019\/03\/PM-D\u00f6rner-Bild-und-Spiegelbild.png 2098w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2019\/03\/PM-D\u00f6rner-Bild-und-Spiegelbild-300x111.png 300w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2019\/03\/PM-D\u00f6rner-Bild-und-Spiegelbild-768x283.png 768w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2019\/03\/PM-D\u00f6rner-Bild-und-Spiegelbild-1024x378.png 1024w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><figcaption id=\"caption-attachment-36073\" class=\"wp-caption-text\">The formic acid model is in the centre. The color code of the surrounding sphere shows the direct chirality of the formic acid for every direction from which the laser comes. If the laser is directed from the right side (right arrow), it results in right-handed formic acid; if from the left, in left-handed formic acid. Both chiral formic acids reflect the common structure of the molecule.<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p>Seven of the ten most frequent medications contain chiral agents. These are molecules that occur in right- or left-handed forms. During chemical synthesis both forms usually occur in equal parts and have to be separated afterward, because chirality determines the agent\u2019s effect in the body. Physicists at Goethe University have now succeeded in using laser light for the purpose of creating either right- or left-handed molecules.<\/p>\n<p>\u201cIn pharmaceutics, being able to transition a molecule from one chirality to the other using light instead of wet chemistry would be a dream,\u201d says Professor Reinhard D\u00f6rner from the Institute of Atomic Physics at Goethe University. His doctoral student Kilian Fehre has now brought this dream one step closer to coming true. His observation: the formation of the right- or left-handed version depends on the direction from which laser light hits the initiator.<\/p>\n<p>For his experiment, Kilian Fehre used the planar formic acid molecule. He activated it with an intense, circularly polarized laser pulse to transition it to a chiral form. At the same time, the radiation caused the molecule to break into its atomic components. It was necessary to destroy the molecule for the experiment so that it could be determined whether a duplicate or mirror version was created.<\/p>\n<p>Fehre used the \u201creaction microscope\u201d (COLTRIMS method) that was developed at the Institute for Atomic Physics for the analysis. It allows the investigation of individual molecules in a molecular beam. After the molecule\u2019s explosive breakdown, the data provided by the detector can be used to precisely calculate the direction and speed of the fragments\u2019 paths. This makes it possible to reconstruct the molecule\u2019s spatial structure.<\/p>\n<p>In order to create chiral molecules with the desired chirality in the future, it has to be ensured that the molecules are oriented the same way with regard to the circularly polarized laser pulse. This could be achieved by orienting them beforehand using a long-wave laser light.<\/p>\n<p>This discovery could also play a critical role in generating larger quantities of molecules with uniform chirality. However, the researchers believe that in such cases, liquids would probably be radiated rather than gases. \u201cThere is a lot of work to be done before we get that far,\u201d Kilian Fehre believes.<\/p>\n<p>The detection and manipulation of chiral molecules using light is the focus of a priority programme which goes by the memorable name \u201cELCH\u201d and which has been funded by the German Research Council since 2018. Scientists from Kassel, Marburg, Hamburg and Frankfurt have joined forces in this programme. \u201cThe long-term funding and the close collaboration with the priority programme provide us with the necessary resources to learn to control chirality in a large class of molecules in the future,\u201d concludes Markus Sch\u00f6ffler, one of the Frankfurt project managers of the priority programme.<\/p>\n<p>[dt_call_to_action content_size=&#8220;small&#8220; background=&#8220;fancy&#8220; line=&#8220;true&#8220; animation=&#8220;fadeIn&#8220;]<\/p>\n<p><strong>Publication<\/strong>: K. Fehre, S. Eckart, M. Kunitski, M. Pitzer, S. Zeller, C. Janke, D. Trabert, J. Rist, M. Weller, A. Hartung, L. Ph. H. Schmidt, T. Jahnke, R. Berger, R. D\u00f6rner und M. S. Sch\u00f6ffler: Enantioselective fragmentation of an achiral molecule in a strong laser field, in: Science Advances,&nbsp;doi: 10.1126\/sciadv.aau7923<\/p>\n<p>[\/dt_call_to_action]<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Seven of the ten most frequent medications contain chiral agents. These are molecules that occur in right- or left-handed forms. During chemical synthesis both forms usually occur in equal [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":36071,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":""},"categories":[126,254],"tags":[242],"post_folder":[],"class_list":["post-36097","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-english","category-research","tag-physics"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Physics \/ Laser light determines chirality of molecules | Aktuelles aus der Goethe-Universit\u00e4t Frankfurt<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aktuelles.uni-frankfurt.de\/en\/english\/physics-laser-light-determines-chirality-of-molecules\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Physics \/ Laser light determines chirality of molecules | Aktuelles aus der Goethe-Universit\u00e4t Frankfurt\" \/>\n<meta property=\"og:description\" content=\"&nbsp; Seven of the ten most frequent medications contain chiral agents. 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