Effect of molecular structure on fragmentation of isolated organic molecules in solid rare gas matrices
A V Kobzarenko
1, 2, 3
,
F F Sukhov
1, 2, 3
,
A. Yu. Orlov
4
,
G. V. KOVALEV
1, 2, 3
,
I A Baranova
1, 2, 3
,
Vladimir I. Feldman
1, 2, 3
1
DEPARTMENT OF CHEMISTRY
3
119991 Moscow Russia
|
Publication type: Journal Article
Publication date: 2012-09-01
scimago Q2
wos Q1
SJR: 0.543
CiteScore: 5.6
Impact factor: 3.3
ISSN: 0969806X, 18790895
Radiation
Abstract
Abstract The effect of excess energy on the primary radical cations of bifunctional carbonyl compounds and aliphatic alkynes was simulated by matrix isolation method using rare gas matrices with various ionization potentials. The formation of fragmentation products was monitored by EPR and FTIR spectroscopy. It was shown that the radical cations of bifunctional compounds (CH 3 OCH 2 COCH 3 and CH 3 COCOCH 3 ) dissociated effectively yielding CH 3 radicals upon irradiation in solid argon matrix at T ≤16 K. In addition to isolated methyl radicals, the radical pairs consisting of two methyl radicals separated by two CO molecules were detected in the case of diacetyl. The probability of fragmentation decreases with the decreasing excess energy by switching from Ar to Xe. In general, bifunctional molecules were found to be less stable to “hot” ionic fragmentation in low-temperature solids in comparison with simple prototype compounds. In the case of alkynes of the RCCH type, a noticeable yield of fragmentation products was observed when R=–C(CH 3 ) 3 , but it was negligible for R=–CH 3 . The mechanisms of “hot” reactions and excess energy relaxation are discussed.
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Kobzarenko A. V. et al. Effect of molecular structure on fragmentation of isolated organic molecules in solid rare gas matrices // Radiation Physics and Chemistry. 2012. Vol. 81. No. 9. pp. 1434-1439.
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Kobzarenko A. V., Sukhov F. F., Orlov A. Y., KOVALEV G. V., Baranova I. A., Feldman V. I. Effect of molecular structure on fragmentation of isolated organic molecules in solid rare gas matrices // Radiation Physics and Chemistry. 2012. Vol. 81. No. 9. pp. 1434-1439.
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RIS
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TY - JOUR
DO - 10.1016/j.radphyschem.2012.01.004
UR - https://linkinghub.elsevier.com/retrieve/pii/S0969806X12000084
TI - Effect of molecular structure on fragmentation of isolated organic molecules in solid rare gas matrices
T2 - Radiation Physics and Chemistry
AU - Kobzarenko, A V
AU - Sukhov, F F
AU - Orlov, A. Yu.
AU - KOVALEV, G. V.
AU - Baranova, I A
AU - Feldman, Vladimir I.
PY - 2012
DA - 2012/09/01
PB - Elsevier
SP - 1434-1439
IS - 9
VL - 81
SN - 0969-806X
SN - 1879-0895
ER -
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BibTex (up to 50 authors)
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@article{2012_Kobzarenko,
author = {A V Kobzarenko and F F Sukhov and A. Yu. Orlov and G. V. KOVALEV and I A Baranova and Vladimir I. Feldman},
title = {Effect of molecular structure on fragmentation of isolated organic molecules in solid rare gas matrices},
journal = {Radiation Physics and Chemistry},
year = {2012},
volume = {81},
publisher = {Elsevier},
month = {sep},
url = {https://linkinghub.elsevier.com/retrieve/pii/S0969806X12000084},
number = {9},
pages = {1434--1439},
doi = {10.1016/j.radphyschem.2012.01.004}
}
Cite this
MLA
Copy
Kobzarenko, A. V., et al. “Effect of molecular structure on fragmentation of isolated organic molecules in solid rare gas matrices.” Radiation Physics and Chemistry, vol. 81, no. 9, Sep. 2012, pp. 1434-1439. https://linkinghub.elsevier.com/retrieve/pii/S0969806X12000084.