Extraterrestrial hexamethylenetetramine in meteorites-a precursor of prebiotic chemistry in the inner solar system.
Extraterrestrial hexamethylenetetramine in meteorites-a precursor of prebiotic chemistry in the inner solar system.
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DOI：
10.1038/s41467-020-20038-x
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发表时间：
2020-12-07
影响因子：
16.6
通讯作者：
Tachibana S
中科院分区：
文献类型：
--
作者：
Oba Y;Takano Y;Naraoka H;Furukawa Y;Glavin DP;Dworkin JP;Tachibana S
尽管对各种外星环境中有机分子的形成进行了广泛的研究，但这些分子何时、何地以及如何非生物形成仍然存在争议。六亚甲基四胺（HMT）是解决这一问题的关键分子，尽管大量实验室实验证据表明它可以在星际或彗星环境中产生，但尚未在外星材料中得到证实。在这里，我们报告了在默奇森、默里和塔吉什湖碳质球粒陨石中首次检测到 HMT 和功能化 HMT 物种。虽然默奇森和塔吉什湖中 HMT 的十亿分之一浓度与氨基酸等其他相关可溶性有机分子相当，但由于提取过程中 HMT 的损失，这些化合物可能在之前的研究中未能被检测到。 HMT 可以在降解后产生重要的生命前化学分子，例如甲醛和氨，它可能是具有天体化学和天体物理学意义的陨石有机化合物的前体。这份手稿探讨了碳质陨石中有机分子的起源。作者在三块碳质陨石中鉴定出六亚甲基四胺，提出通过星际介质中的光化学和热反应由氨和甲醛形成，然后并入行星系统。
Despite extensive studies on the formation of organic molecules in various extraterrestrial environments, it still remains under debate when, where, and how such molecules were abiotically formed. A key molecule to solve the problem, hexamethylenetetramine (HMT) has not been confirmed in extraterrestrial materials despite extensive laboratory experimental evidence that it can be produced in interstellar or cometary environments. Here we report the first detection of HMT and functionalized HMT species in the carbonaceous chondrites Murchison, Murray, and Tagish Lake. While the part-per-billion level concentration of HMT in Murchison and Tagish Lake is comparable to other related soluble organic molecules like amino acids, these compounds may have eluded detection in previous studies due to the loss of HMT during the extraction processes. HMT, which can yield important molecules for prebiotic chemistry such as formaldehyde and ammonia upon degradation, is a likely precursor of meteoritic organic compounds of astrochemical and astrophysical interest. This manuscript tackles the origin of organic molecules in carbonaceous meteorites. Identifying hexamethylenetetramine in three carbonaceous meteorites, the authors propose formation from ammonia and formaldehyde by photochemical and thermal reactions in the interstellar medium, followed by the incorporation into planetary systems.
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影响因子：
13.6
作者：
Altwegg K;Balsiger H;Bar-Nun A;Berthelier JJ;Bieler A;Bochsler P;Briois C;Calmonte U;Combi MR;Cottin H;De Keyser J;Dhooghe F;Fiethe B;Fuselier SA;Gasc S;Gombosi TI;Hansen KC;Haessig M;Jäckel A;Kopp E;Korth A;Le Roy L;Mall U;Marty B;Mousis O;Owen T;Rème H;Rubin M;Sémon T;Tzou CY;Hunter Waite J;Wurz P
通讯作者：
Wurz P
影响因子：
4.9
作者：
Bekaert, David V.;Derenne, Sylvie;Marty, Bernard
通讯作者：
Marty, Bernard
影响因子：
5.3
作者：
Gautier, T.;Danger, G.;d'Hendecourt, L. S.
通讯作者：
d'Hendecourt, L. S.
影响因子：
4.8
作者：
Fedoseev, G.;Cuppen, H. M.;Linnartz, H.
通讯作者：
Linnartz, H.
影响因子：
4
作者：
IWAKAMI, Y;TAKAZONO, M;TSUCHIYA, T
通讯作者：
TSUCHIYA, T