Radiation-induced transformations of isolated CH3CN molecules in noble gas matrices

Kameneva S.V., Volosatova A.D., Feldman V.I.
Тип документаJournal Article
Дата публикации2017-12-01
Название журналаRadiation Physics and Chemistry
Издатель
  • Radiation
Краткое описание
Abstract The transformations of isolated CH 3 CN molecules in various solid noble-gas matrices (Ne, Ar, Kr, and Xe) under the action of X-ray irradiation at 5 K were investigated by FTIR spectroscopy. The main products are CH 3 NC, CH 2 CNH and CH 2 NCH molecular isomers as well as CH 2 CN and CH 2 NC radicals. The matrix has a strong effect on the distribution of reaction channels. In particular, the highest relative yield of keteneimine (CH 2 CNH) was found in Ne matrix, whereas the formation of CH 3 NC predominates in xenon. It was explained by differences in the matrix ionization energy (IE) resulting in different distributions of hot ionic reactions. The reactions of neutral excited states are mainly involved in Xe matrix with low IE, while the isomerization of the primary acetonitrile positive ions may be quite effective in Ne and Ar. Annealing of the irradiated samples results in mobilization of trapped hydrogen atoms followed by their reactions with radicals to yield parent molecule and its isomers. The scheme of the radiation-induced processes and its implications for the acetonitrile chemistry in cosmic ices are discussed.
Пристатейные ссылки: 44
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1. Kameneva S.V., Volosatova A.D., Feldman V.I. Radiation-induced transformations of isolated CH3CN molecules in noble gas matrices // Radiation Physics and Chemistry. 2017. Т. 141. С. 363–368.
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TY - JOUR

DO - 10.1016/j.radphyschem.2017.08.011

UR - http://dx.doi.org/10.1016/j.radphyschem.2017.08.011

TI - Radiation-induced transformations of isolated CH3CN molecules in noble gas matrices

T2 - Radiation Physics and Chemistry

AU - Kameneva, Svetlana V.

AU - Volosatova, Anastasia D.

AU - Feldman, Vladimir I.

PY - 2017

DA - 2017/12

PB - Elsevier BV

SP - 363-368

VL - 141

SN - 0969-806X

ER -

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@article{2017,

doi = {10.1016/j.radphyschem.2017.08.011},

url = {https://doi.org/10.1016%2Fj.radphyschem.2017.08.011},

year = 2017,

month = {dec},

publisher = {Elsevier {BV}},

volume = {141},

pages = {363--368},

author = {Svetlana V. Kameneva and Anastasia D. Volosatova and Vladimir I. Feldman},

title = {Radiation-induced transformations of isolated {CH}3CN molecules in noble gas matrices}

}

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Kameneva, Svetlana V., Anastasia D. Volosatova, and Vladimir I. Feldman. “Radiation-Induced Transformations of Isolated CH3CN Molecules in Noble Gas Matrices.” Radiation Physics and Chemistry 141 (2017): 363–368. Crossref. Web.