{"id":4737,"date":"2024-09-02T09:53:44","date_gmt":"2024-09-02T09:53:44","guid":{"rendered":"https:\/\/wp.icmm.csic.es\/esisna\/?p=4737"},"modified":"2024-09-11T10:07:26","modified_gmt":"2024-09-11T10:07:26","slug":"gas-phase-synthesis-of-n-alkanes-in-circumstellar-environments","status":"publish","type":"post","link":"https:\/\/wp.icmm.csic.es\/esisna\/2024\/09\/02\/gas-phase-synthesis-of-n-alkanes-in-circumstellar-environments\/","title":{"rendered":"Gas-Phase Synthesis of n-Alkanes in Circumstellar Environments"},"content":{"rendered":"<p>Aliphatics are prevalent in various solar system bodies and the interstellar medium, with linear alkanes (n-C<sub>n<\/sub>H<sub>2n+2<\/sub>) detected in carbonaceous chondrites in small amounts. Despite their consistent presence, their formation mechanism in meteorites remains unclear. This study proposes a gas-phase synthesis mechanism for n-alkanes from carbon and hydrogen under conditions similar to carbon-rich circumstellar environments. Using advanced microscopy and spectroscopy techniques, the researchers identified n-alkanes (n-C<sub>8<\/sub>H<sub>18<\/sub> to n-C<sub>32<\/sub>H<sub>66<\/sub>) within carbon nanostructures. Ab-initio calculations support a methyl-methylene addition (MMA) mechanism for alkane growth, potentially explaining their presence in interstellar dust and meteorites.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4733 aligncenter\" src=\"https:\/\/wp.icmm.csic.es\/esisna\/wp-content\/uploads\/sites\/26\/2024\/09\/alcanos-2024-275x300.png\" alt=\"\" width=\"346\" height=\"377\" srcset=\"https:\/\/wp.icmm.csic.es\/esisna\/wp-content\/uploads\/sites\/26\/2024\/09\/alcanos-2024-275x300.png 275w, https:\/\/wp.icmm.csic.es\/esisna\/wp-content\/uploads\/sites\/26\/2024\/09\/alcanos-2024-138x150.png 138w, https:\/\/wp.icmm.csic.es\/esisna\/wp-content\/uploads\/sites\/26\/2024\/09\/alcanos-2024.png 579w\" sizes=\"auto, (max-width: 346px) 100vw, 346px\" \/><\/p>\n<p>You can find the work published in:<\/p>\n<p>n-Alkanes formed by methyl-methylene addition as a source of meteoritic aliphatics, P. Merino, L. Mart\u00ednez, G. Santoro, J. I. Mart\u00ednez, K. Lauwaet, M. Accolla, N. Ruiz del \u00c1rbol, C. S\u00e1nchez-S\u00e1nchez, A. Mart\u00edn-Jim\u00e9nez, R. Otero, M. Piantek, D. Serrate, R. Lebr\u00f3n-Auilar, J. E. Quintanilla-L\u00f3pez, J. M\u00e9ndez, P. L. De Andr\u00e9s, J. A. Mart\u00edn-Gago, Commun. Chem., 7 (2024) 165. <a href=\"https:\/\/www.nature.com\/articles\/s42004-024-01248-6\"><span style=\"color: #0000ff\">Link<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aliphatics are prevalent in various solar system bodies and the interstellar medium, with linear alkanes (n-CnH2n+2) detected in carbonaceous chondrites in small amounts. Despite their consistent presence, their formation mechanism in meteorites remains unclear. This study proposes a gas-phase synthesis mechanism for n-alkanes from carbon and hydrogen under conditions similar\u2026<\/p>\n<p> <a class=\"continue-reading-link\" href=\"https:\/\/wp.icmm.csic.es\/esisna\/2024\/09\/02\/gas-phase-synthesis-of-n-alkanes-in-circumstellar-environments\/\"><span>Continue reading<\/span><i class=\"crycon-right-dir\"><\/i><\/a> <\/p>\n","protected":false},"author":50,"featured_media":4733,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[50,61,48],"tags":[],"class_list":["post-4737","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dft","category-stardust","category-stm"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/posts\/4737","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=4737"}],"version-history":[{"count":6,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/posts\/4737\/revisions"}],"predecessor-version":[{"id":4752,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/posts\/4737\/revisions\/4752"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/media\/4733"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/media?parent=4737"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/categories?post=4737"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/esisna\/wp-json\/wp\/v2\/tags?post=4737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}