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 language | English (US) |
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Pages (from-to) | 4351-4353 |
Number of pages | 3 |
Journal | Journal of physical chemistry |
Volume | 87 |
Issue number | 22 |
DOIs | |
State | Published - Jan 1 1983 |
ASJC Scopus subject areas
- General Engineering
- Physical and Theoretical Chemistry