https:\/\/doi.org\/10.1039\/D3NR02564K<\/a><\/p>\nPhotocleavage of Aliphatic C\u2013C Bonds in the Interstellar Medium, <\/strong>Guillermo Tajuelo-Castilla, Jes\u00fas I. Mendieta-Moreno, Mario Accolla, Jes\u00fas M. Sobrado, Sofia Canola, Pavel Jel\u00ednek, Gary J. Ellis, Jos\u00e9 \u00c1ngel Mart\u00edn-Gago, and Gonzalo Santoro, Astrophys. J. 965 (2024) 184.<\/p>\n","protected":false},"excerpt":{"rendered":"In the interstellar medium (ISM), UV processing leads to significant chemical transformations in hydrocarbons. Aliphatic hydrocarbons such as alkanes, commonly formed in evolved stars, undergo dehydrogenation primarily through UV-induced photocleavage of C\u2013C bonds rather than direct hydrogen elimination. This study combines experimental data and ab initio calculations to understand how\u2026<\/p>\n
Continue reading<\/span><\/i><\/a> <\/p>\n","protected":false},"author":50,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[62,50,72],"tags":[],"class_list":["post-4580","post","type-post","status-publish","format-standard","hentry","category-astrophysics","category-dft","category-uv-radiation"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/posts\/4580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/users\/50"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/comments?post=4580"}],"version-history":[{"count":7,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/posts\/4580\/revisions"}],"predecessor-version":[{"id":4591,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/posts\/4580\/revisions\/4591"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/media?parent=4580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/categories?post=4580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/tags?post=4580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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In the interstellar medium (ISM), UV processing leads to significant chemical transformations in hydrocarbons. Aliphatic hydrocarbons such as alkanes, commonly formed in evolved stars, undergo dehydrogenation primarily through UV-induced photocleavage of C\u2013C bonds rather than direct hydrogen elimination. This study combines experimental data and ab initio calculations to understand how UV absorption at the H-Ly\u03b1 emission line (121.6 nm) initiates the transition of alkanes to excited Rydberg states, resulting in the formation of olefinic C=C bonds, crucial precursors to aromatic hydrocarbons. The findings highlight a potential bottom-up pathway for the synthesis of unsaturated and aromatic hydrocarbons in dark clouds of the ISM.<\/p>\n