Exciplex formation and behavior in the 9,10-dicyanoanthracene-stilbene system

Frederick D. Lewis*, Ruth E. Dykstra

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Quenching of singlet 9,10-dicyanoanthracene by several substituted trans- and cis-stilbenes in non-polar solvents results in the formation of singlet exciplexes, some of which are weakly fluorescent. Rate constants for fluorescence quenching and exciplex fluorescence maxima and intensities are dependent upon the stilbene oxidation potential, as expected for the formation of a charge transfer stabilized exciplex. Non-radiative decay results in moderately efficient isomerization of the cis-stilbenes, but not of the trans-stilbenes. Several mechanisms are considered for the selective isomerization of the cis isomers. Formation of a singlet biradical which cleaves selectively to yield trans- vs. cis-stilbenes is considered to be more likely than mechanisms involving the formation of stilbene singlet or triplet excited states.

Original languageEnglish (US)
Pages (from-to)109-119
Number of pages11
JournalJournal of Photochemistry and Photobiology, A: Chemistry
Volume49
Issue number1-2
DOIs
StatePublished - Sep 1989

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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