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Radiation-Induced Transformations of C6H6 Molecules in Solid Noble-Gas Matrices: Is Benzene Intrinsically Resistant in Condensed Media?
J Phys Chem A 2019; 123(25):5199-5205JP

Abstract

The radiation resistance of aromatic compounds is one of the key concepts of basic and applied radiation chemistry in condensed phases. Usually, it is attributed to the intrinsic radiation stability of the benzene ring. In this work, we have demonstrated for the first time that the isolated benzene molecules undergo rather efficient radiation-induced degradation in rigid inert media at cryogenic temperatures (comparable to that of aliphatic hydrocarbons), and their stability is essentially determined by the intermolecular relaxation correlating with matrix polarizability. The principal primary products of benzene radiolysis in matrices are phenyl radicals and fulvene. The matrix environment strongly affects the proportion of these species because of external heavy atom effect on the intersystem crossing, which may trigger further reaction pathways. The obtained results may have important implications for the prediction of radiation stability of complex organic systems and polymers. Furthermore, they may contribute to a better understanding of the radiation-induced evolution of aromatic species in cold interstellar media.

Authors+Show Affiliations

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

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31150245

Citation

Lukianova, Mariia A., et al. "Radiation-Induced Transformations of C6H6 Molecules in Solid Noble-Gas Matrices: Is Benzene Intrinsically Resistant in Condensed Media?" The Journal of Physical Chemistry. A, vol. 123, no. 25, 2019, pp. 5199-5205.
Lukianova MA, Sanochkina EV, Feldman VI. Radiation-Induced Transformations of C6H6 Molecules in Solid Noble-Gas Matrices: Is Benzene Intrinsically Resistant in Condensed Media? J Phys Chem A. 2019;123(25):5199-5205.
Lukianova, M. A., Sanochkina, E. V., & Feldman, V. I. (2019). Radiation-Induced Transformations of C6H6 Molecules in Solid Noble-Gas Matrices: Is Benzene Intrinsically Resistant in Condensed Media? The Journal of Physical Chemistry. A, 123(25), pp. 5199-5205. doi:10.1021/acs.jpca.9b01137.
Lukianova MA, Sanochkina EV, Feldman VI. Radiation-Induced Transformations of C6H6 Molecules in Solid Noble-Gas Matrices: Is Benzene Intrinsically Resistant in Condensed Media. J Phys Chem A. 2019 Jun 27;123(25):5199-5205. PubMed PMID: 31150245.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Radiation-Induced Transformations of C6H6 Molecules in Solid Noble-Gas Matrices: Is Benzene Intrinsically Resistant in Condensed Media? AU - Lukianova,Mariia A, AU - Sanochkina,Elizaveta V, AU - Feldman,Vladimir I, Y1 - 2019/06/12/ PY - 2019/6/1/pubmed PY - 2019/6/1/medline PY - 2019/6/1/entrez SP - 5199 EP - 5205 JF - The journal of physical chemistry. A JO - J Phys Chem A VL - 123 IS - 25 N2 - The radiation resistance of aromatic compounds is one of the key concepts of basic and applied radiation chemistry in condensed phases. Usually, it is attributed to the intrinsic radiation stability of the benzene ring. In this work, we have demonstrated for the first time that the isolated benzene molecules undergo rather efficient radiation-induced degradation in rigid inert media at cryogenic temperatures (comparable to that of aliphatic hydrocarbons), and their stability is essentially determined by the intermolecular relaxation correlating with matrix polarizability. The principal primary products of benzene radiolysis in matrices are phenyl radicals and fulvene. The matrix environment strongly affects the proportion of these species because of external heavy atom effect on the intersystem crossing, which may trigger further reaction pathways. The obtained results may have important implications for the prediction of radiation stability of complex organic systems and polymers. Furthermore, they may contribute to a better understanding of the radiation-induced evolution of aromatic species in cold interstellar media. SN - 1520-5215 UR - https://www.unboundmedicine.com/medline/citation/31150245/Radiation-Induced_Transformations_of_C6H6_Molecules_in_Solid_Noble-Gas_Matrices:_Is_Benzene_Intrinsically_Resistant_in_Condensed_Media L2 - https://dx.doi.org/10.1021/acs.jpca.9b01137 DB - PRIME DP - Unbound Medicine ER -