Polyene spectroscopy: Vibronic evidence for a forbidden transition in DECA-2,4,6,8-tetraene

John R. Andrews, Bruce S. Hudson

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

The dimethylpolyene deca-2,4,6,8-tetraene was studied by absorption, fluorescence excitation and fluorescence spectroscopy in glasses at 77 K and in n-alkane crystals at 4.2 K. A strong transition to a 1Bu excited state is observed with an origin at 32400 cm-1 in isopentane at 77 K and at 31280 cm-1 in n-undecane at 4.2 K. A weak transition to a 1Ag excited state is observed with an origin at 28738 cm-1 in the n-undecane matrix. The radiative fluorescence lifetime is 500 ns. In undecane the transition from the ground state to the 1Ag excited state exhibits a classic Herzberg-Teller vibronic pattern indicating a symmetry forbidden transition.

Original languageEnglish (US)
Pages (from-to)600-604
Number of pages5
JournalChemical Physics Letters
Volume57
Issue number4
DOIs
StatePublished - Aug 15 1978

ASJC Scopus subject areas

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

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