Quenching of Aromatic Hydrocarbon Singlets and Aryl Ketone Triplets by Alkyl Disulfides

William L. Wallace, Richard P. Van Duyne, Frederick D. Lewis

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Quenching of aromatic hydrocarbon fluorescence and aryl ketone phosphorescence by alkyl disulfides has been investigated. Two quenching mechanisms, charge-transfer stabilized exciplex formation and electronic energy transfer, have been considered. Charge transfer appears to be unimportant for the aromatic hydrocarbons and ketones studied. Endothermic singlet-singlet energy transfer is more efficient than predicted by the Arrhenius equation. Excitation of vibrationally excited ground-state disulfide molecules provides a possible explanation for efficient endothermic quenching. Low-temperature uv spectroscopy indicates that the long-wavelength absorption of disulfides consists predominately of hot-band transitions.

Original languageEnglish (US)
Pages (from-to)5319-5326
Number of pages8
JournalJournal of the American Chemical Society
Volume98
Issue number17
DOIs
StatePublished - Aug 1 1976

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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