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Monthly Notices of the Royal Astronomical Society

Radiation-induced chemistry in the C2H2–H2O system at cryogenic temperatures: A matrix isolation study

Zasimov Pavel V ¹

Ryazantsev Sergey V ^{1, 2}

Tyurin Daniil A ¹

Feldman Vladimir I. ¹

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Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia |

Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia |

Publication type: Journal Article

Publication date: 2019-11-19

Oxford University Press

Journal: Monthly Notices of the Royal Astronomical Society

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Impact factor: 4.8

ISSN: 00358711, 13652966

DOI: 10.1093/mnras/stz3228

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Space and Planetary Science

Astronomy and Astrophysics

Abstract

Investigations of the low-temperature radiation-induced transformations in the C2H2–H2O system are relevant to the chemistry occurring in interstellar and cometary ices. In this work we applied a matrix isolation technique to study the radiation-driven evolution of this system at molecular level in order to get new mechanistic insight. The 1:1 C2H2∙∙∙H2O complexes were prepared in various solid noble-gas matrices (Ar, Kr, Xe) and these icy matrices were subjected to X-ray irradiation at 5 K. Decomposition of initial complex and formation of products were monitored by FTIR spectroscopy. It was found that complexation with H2O resulted in significant enhancement of the radiolytic decay of C2H2 molecules and provided new channels for its radiation-induced transformations. Ketene (both isolated H2CCO and in the form of H2CCO–H2 pair), ketenyl radical (HCCO), carbon monoxide (CO) and methane (CH4) were observed as main products of the C2H2∙∙∙H2O radiolysis. In addition, vinyl alcohol (CH2CHOH) was detected in an Ar matrix. The mechanistic interpretation (reaction routes leading to formation of these products) is discussed on the basis of consideration of kinetic dependencies and matrix effects. Conversion of C2H2∙∙∙H2O to CH4 is a prominent example of water-mediated cleavage of the C≡C triple bond, which may occur under prolonged irradiation in rigid media. Possible astrochemical implications of the obtained results are highlighted.

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Citations by journals

	1 2
Monthly Notices of the Royal Astronomical Society	Monthly Notices of the Royal Astronomical Society, 2, 28.57% Monthly Notices of the Royal Astronomical Society 2 publications, 28.57%
Journal of the American Chemical Society	Journal of the American Chemical Society, 1, 14.29% Journal of the American Chemical Society 1 publication, 14.29%
Journal of Chemical Physics	Journal of Chemical Physics, 1, 14.29% Journal of Chemical Physics 1 publication, 14.29%
Astrophysical Journal	Astrophysical Journal, 1, 14.29% Astrophysical Journal 1 publication, 14.29%
Frontiers in Astronomy and Space Sciences	Frontiers in Astronomy and Space Sciences, 1, 14.29% Frontiers in Astronomy and Space Sciences 1 publication, 14.29%
ACS Earth and Space Chemistry	ACS Earth and Space Chemistry, 1, 14.29% ACS Earth and Space Chemistry 1 publication, 14.29%
	1 2

Citations by publishers

	1 2
Oxford University Press	Oxford University Press, 2, 28.57% Oxford University Press 2 publications, 28.57%
American Chemical Society (ACS)	American Chemical Society (ACS), 2, 28.57% American Chemical Society (ACS) 2 publications, 28.57%
American Institute of Physics (AIP)	American Institute of Physics (AIP), 1, 14.29% American Institute of Physics (AIP) 1 publication, 14.29%
American Astronomical Society	American Astronomical Society, 1, 14.29% American Astronomical Society 1 publication, 14.29%
Frontiers Media S.A.	Frontiers Media S.A., 1, 14.29% Frontiers Media S.A. 1 publication, 14.29%
	1 2

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Zasimov P. V. et al. Radiation-induced chemistry in the C2H2–H2O system at cryogenic temperatures: A matrix isolation study // Monthly Notices of the Royal Astronomical Society. 2019.

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Zasimov P. V., Ryazantsev S. V., Tyurin D. A., Feldman V. I. Radiation-induced chemistry in the C2H2–H2O system at cryogenic temperatures: A matrix isolation study // Monthly Notices of the Royal Astronomical Society. 2019.

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RIS Copy

TY - JOUR

DO - 10.1093/mnras/stz3228

UR - https://doi.org/10.1093%2Fmnras%2Fstz3228

TI - Radiation-induced chemistry in the C2H2–H2O system at cryogenic temperatures: A matrix isolation study

T2 - Monthly Notices of the Royal Astronomical Society

AU - Feldman, Vladimir I.

AU - Zasimov, Pavel V

AU - Ryazantsev, Sergey V

AU - Tyurin, Daniil A

PY - 2019

DA - 2019/11/19 00:00:00

PB - Oxford University Press

SN - 0035-8711

SN - 1365-2966

ER -

BibTex

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@article{2019_Zasimov,

author = {Vladimir I. Feldman and Pavel V Zasimov and Sergey V Ryazantsev and Daniil A Tyurin},

title = {Radiation-induced chemistry in the C2H2–H2O system at cryogenic temperatures: A matrix isolation study},

journal = {Monthly Notices of the Royal Astronomical Society},

year = {2019},

publisher = {Oxford University Press},

month = {nov},

url = {https://doi.org/10.1093%2Fmnras%2Fstz3228},

doi = {10.1093/mnras/stz3228}

}

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Publisher

Oxford University Press

Journal

Monthly Notices of the Royal Astronomical Society

Quartile SCImago

Quartile WOS

Impact factor

4.8

ISSN

00358711 (Print)
13652966 (Electronic)

Labs

Laboratory of High Energy Chemistry

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