Amine dimer cation radical formation upon quenching of trans-stilbene-amine exciplexes by amines

Walter Hub, Siegfried Schneider, Friedrich Dörr*, Joe D. Oxman, Frederick D. Lewis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The interaction of singlet trans-stilbene with trialkylamines in benzene solution yields fluorescent exciplexes for which the predominant decay pathway is intersystem crossing to yield triplet trans-stilbene. Both the fluorescence and intersystem crossing processes can be quenched by added tertiary and primary amines. Exciplex quenching is subject to a pronounced steric effect, being inhibited by both N and α-C alkylation. Intramolecular exciplex quenching by the free amino group of α,ω-alkanediamines is highly dependent upon the diamine chain length. The observed steric and chain length effects on exciplex quenching are indicative of the formation of a triplex of trans-stilbene anion radical and a σ-bonded amine dimer cation radical.

Original languageEnglish (US)
Pages (from-to)4351-4353
Number of pages3
JournalJournal of physical chemistry
Volume87
Issue number22
DOIs
StatePublished - Jan 1 1983

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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