Electronic spectra of some methyl substituted benzenes in a rare-gas solid

Benjamin Katz, Malk A. Brith, Benjamin Sharf, Joshua Jortner

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29 Scopus citations

Abstract

In this paper we present the results of an experimental study of the absorption spectrum of toluene, toluene-d8, para-xylene, and meta-xylene in solid krypton in the spectral region 2800-4-1800 A. Our main results are: (a) The absorption spectrum of the first (2700 Å) π→π* transition is very sharp for all these matrix isolated molecules and resembles in detail the gas-phase spectrum. (b) The observed vibrational structure of the second (2200 Å) π→π* transition is consistent with the 1A101B1u assignment for this transition in the benzene molecule. (c) The vibrational structure of the third (1850 Å) π→π* transition was resolved. An electronic splitting of 350 cm-1 was observed in the third excited state of para-xylene, which results from lifting of the degeneracy of the corresponding 1E 1u state of the benzene molecule.

Original languageEnglish
Pages (from-to)3924-3934
Number of pages11
JournalJournal of Chemical Physics
Volume54
Issue number9
DOIs
StatePublished - 1 Jan 1971
Externally publishedYes

ASJC Scopus subject areas

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

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