Experimental investigation of nitrile formation from VUV photochemistry of interstellar ices analogs: acetonitrile and amino acetonitrile
Grégoire Danger,J.-B. Bossa,P. de Marcellus,Fabien Borget,Fabrice Duvernay,Patrice Theulé,Thierry Chiavassa,Louis D'Hendecourt +7 more
TLDR
In this paper, the authors used Fourier Transform InfraRed (FTIR) spectroscopy and mass spectrometry to study the formation of ace-tonitrile CH 3 CN from VUV irradiation of ethylamine.Abstract:
Context. The study of the chemical reactivity in interstellar ices in astrophysical environments is an important tool for understanding the origin of the organic matter in molecular clouds, in protoplanetary disks, and possibly, as a final destination, in our solar system. The laboratory simulations of the reactivity in ice analogs provide important information for understanding the reactivity in these environments. Here, we used these experimental simulations to trace some formation pathways of two nitriles, acetonitrile and amino acetonitrile, which are two potential precursors of amino acids in astrophysical environments. Aims. The purpose of this work is to present the first experimental approach for the formation of acetonitrile and amino acetonitrile in interstellar-like conditions. Methods. We use Fourier Transform InfraRed (FTIR) spectroscopy and mass spectrometry to study the formation at 20 K of ace-tonitrile CH 3 CN from VUV irradiation of ethylamine and of amino acetonitrile NH 2 CH 2 CN from VUV irradiation of ammonia: acetonitrile mixture. Isotopic substitutions are used to confirm identifications. Results. We demonstrate that acetonitrile can be formed at 20 K from the VUV irradiation of ethylamine with a yield of 4%. Furthermore, in presence of ammonia, at 20 K and under VUV irradiation, the acetonitrile can lead to the amino acetonitrile for-mation. These results suggest that acetonitrile and amino acetonitrile can be formed in astrophysical environments that are submitted to VUV irradiations.read more
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Hydrogenation of solid hydrogen cyanide HCN and methanimine CH2NH at low temperature
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References
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Journal ArticleDOI
Racemic amino acids from the ultraviolet photolysis of interstellar ice analogues
Max P. Bernstein,Max P. Bernstein,Jason P. Dworkin,Jason P. Dworkin,Scott A. Sandford,George Cooper,Louis J. Allamandola +6 more
TL;DR: A laboratory demonstration that glycine, alanine and serine naturally form from ultraviolet photolysis of the analogues of icy interstellar grains is reported, suggesting that at least some meteoritic amino acids are the result of interstellar photochemistry, rather than formation in liquid water on an early Solar System body.
Journal ArticleDOI
Organic Compounds Produced by Photolysis of Realistic Interstellar and Cometary Ice Analogs Containing Methanol
TL;DR: In this paper, the InfraRed (IR) spectra of UltraViolet (UV) and thermally processed methanol-containing interstellar / cometary ice analogs at temperatures from 12 to 300 K are presented.
Journal ArticleDOI
Cometary Glycine Detected in Samples Returned by Stardust
TL;DR: In this article, the stable carbon isotopic ratios of glycine and E-amino-n-caproic acid (EACA) were sent to Earth by NASA's Stardust spacecraft.
Journal ArticleDOI
Vertical distribution of Titan's atmospheric neutral constituents
TL;DR: The vertical distribution of Titan's neutral atmosphere compounds is calculated from a new photochemical model extending from 40 to 1432 km as mentioned in this paper, which makes use of many updated reaction rates, and of the new scheme for methane photolysis proposed by Mordaunt et al.