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Direct evidence for formation of acetimidic acid and acetamide under irradiation of isolated acetonitrile-water complexes at cryogenic temperaturesстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Drabkin Vladimir D., Volosatova Anastasia D., Feldman Vladimir I.
- Журнал: Monthly Notices of the Royal Astronomical Society
- Том: 518
- Номер: 2
- Год издания: 2023
- Издательство: Oxford Journals, Oxford University Press
- Местоположение издательства: Oxford, UK, England
- Первая страница: 1744
- Последняя страница: 1749
- DOI: 10.1093/mnras/stac3067
- Аннотация: In this work we report the first direct evidence for formation of the key simplest molecule with thepeptide bond (acetamide) under radiation-induced transformations occurring in the CH3CN∙∙∙H2Ocomplex isolated in an argon matrix at 6 K. The 1:1 CH3CN∙∙∙H2O intermolecular complex wasobtained by deposition of CH3CN/H2O/Ar mixtures and characterized by FTIR spectroscopy. Theirradiation of the icy matrix with X-rays results first in formation of acetimidic acid, which istransformed to acetamide at higher absorbed doses. In addition, the products of acetonitrileoxidation (hydroxyacetonitrile and acetonitrile N-oxide) have been detected, which probablyoriginate from the reactions of “hot” radiation-induced oxygen atoms. The formation of acetamidewas confirmed by deuterium isotopic substitution in acetonitrile. We believe that the observedtransformation may be of basic importance for understanding the radiation-induced synthesis ofprebiotic molecules in occurring in cold space media.
- Добавил в систему: Волосатова Анастасия Дмитриевна
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