Radiation Physics and Chemistry, volume 189, pages 109672
Radiation-induced transformations of difluoromethane in noble gas matrices
Publication type: Journal Article
Publication date: 2021-12-01
Journal:
Radiation Physics and Chemistry
Quartile SCImago
Q2
Quartile WOS
Q1
Impact factor: 2.9
ISSN: 0969806X
Radiation
Abstract
Difluoromethane (CH 2 F 2 ) is considered as an ecologically friendly alternative to conventionally used chlorofluorocarbons for various applications. Being photochemically inert in the broad UV range, this molecule can be decomposed only through the action of hard vacuum UV or ionizing radiation, while the corresponding mechanisms are poorly studied. In this work we report the results of model investigations of the X-ray induced decomposition of isolated CH 2 F 2 in solid noble gas matrices at 6 K. The radiation-chemical yields of difluoromethane were found to decrease from 1.3 to 0.1 molecule/100 eV with decreasing the ionization energy of matrix (from Ne to Xe), which indicates significance of the “hot” ionic channels. Difluorocarbene (CF 2 ) was detected as one of the principal radiolysis products in all the matrices, whereas the CHF⋯HF complex was detected in Ne, Ar, and Kr. Annealing of the irradiated samples results in thermally induced reactions of trapped H and F atoms yielding a number of various species, including the noble gas compounds. The radiolysis mechanism, nature of matrix effects and possible implications for atmospheric chemistry are discussed. • Radiolysis of CH 2 F 2 in solid noble gas matrices was investigated by FTIR spectroscopy. • The mechanism of CH 2 F 2 decomposition involving ionic and neutral pathways was proposed. • Thermal reactions of the radiolysis products with H and F atoms are considered. • Possible implications for atmospheric chemistry are outlined.
Citations by journals
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Journal of Physical Chemistry A
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Journal of Physical Chemistry A
2 publications, 40%
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Chemosphere
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1 publication, 20%
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Chemical Physics Letters
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Chemical Physics Letters
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Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics
1 publication, 20%
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Citations by publishers
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Elsevier
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Elsevier
2 publications, 40%
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American Chemical Society (ACS)
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American Chemical Society (ACS)
2 publications, 40%
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Royal Society of Chemistry (RSC)
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Royal Society of Chemistry (RSC)
1 publication, 20%
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Sosulin I. S., Feldman V. I. Radiation-induced transformations of difluoromethane in noble gas matrices // Radiation Physics and Chemistry. 2021. Vol. 189. p. 109672.
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Sosulin I. S., Feldman V. I. Radiation-induced transformations of difluoromethane in noble gas matrices // Radiation Physics and Chemistry. 2021. Vol. 189. p. 109672.
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TY - JOUR
DO - 10.1016/j.radphyschem.2021.109672
UR - https://doi.org/10.1016%2Fj.radphyschem.2021.109672
TI - Radiation-induced transformations of difluoromethane in noble gas matrices
T2 - Radiation Physics and Chemistry
AU - Sosulin, Ilya S
AU - Feldman, Vladimir I.
PY - 2021
DA - 2021/12/01 00:00:00
PB - Elsevier
SP - 109672
VL - 189
SN - 0969-806X
ER -
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@article{2021_Sosulin,
author = {Ilya S Sosulin and Vladimir I. Feldman},
title = {Radiation-induced transformations of difluoromethane in noble gas matrices},
journal = {Radiation Physics and Chemistry},
year = {2021},
volume = {189},
publisher = {Elsevier},
month = {dec},
url = {https://doi.org/10.1016%2Fj.radphyschem.2021.109672},
pages = {109672},
doi = {10.1016/j.radphyschem.2021.109672}
}
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