Solvent and substituent effects in aromatic carbonyl compounds: The lowest triplet states of xanthone and xanthone-18O1

Henry J. Pownall, William W. Mantulin

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

The phosphorescence of xanthone and xanthone-18O1 in ethanol-ether-isopentane (EPA) and in 3-methylpentane (3-MP) has been studied between 12 and 125 K. The dual phosphorescence in this ketone is attributed to the existence of two different ground-state conformations, each of which has a characteristic triplet state. The longer-lived phosphorescence is assigned to a more planar conformation than the short-lived species. Because a progression based on the carbonyl stretch frequency appears in both short and long-lived components, we assign some n, π* character to both forms. Thermally populated fluorescence from the lowest1(n, π*) state of xanthone is also reported for the first time. f To whom correspondence should be directed.

Original languageEnglish (US)
Pages (from-to)1393-1406
Number of pages14
JournalMolecular Physics
Volume31
Issue number5
DOIs
StatePublished - Jun 1976

ASJC Scopus subject areas

  • Biophysics
  • Molecular Biology
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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