Ionizing radiation and natural constituents of living cells: Low-energy electron interaction with coenzyme Q analogs

Stanislav A. Pshenichnyuk, Alberto Modelli, Nail L. Asfandiarov, Alexey S. Komolov

Research output

Abstract

Resonance electron attachment to short-tail analogs of coenzyme Q10 is investigated in the electron energy range 0 eV-14 eV under gas-phase conditions by means of dissociative electron attachment spectroscopy. Formation of long-lived (milliseconds) molecular negative ions is detected at 1.2 eV, but not at thermal energy. A huge increase in the electron detachment time as compared with the reference para-benzoquinone (40 µs) is ascribed to the presence of the isoprene side chains. Elimination of a neutral CH3 radical is found to be the most intense decay detected on the microsecond time scale. The results give some insight into the timescale of electron-driven processes stimulated in living tissues by high-energy radiation and are of importance in prospective fields of radiobiology and medicine.

Original languageEnglish
Pages (from-to)111103
Number of pages6
JournalThe Journal of Chemical Physics
Volume153
Issue number11
DOIs
Publication statusPublished - 28 Sep 2020

Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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