Characteristics of Triplet Exciplexes in the Photolysis of 2,6-Diphenyl-1,4-benzoquinone with Amines

Abstract

The spectral and kinetic characteristics of short-lived triplet exciplexes, formed by quenching the triplet state of acceptor 2,6-diphenyl-1,4-benzoquione (Q) with electron donors 1,4-diazabicyclo[2.2.2]octane and triphenylamine, are studied. The elementary events of the reaction are investigated in vitro in different solvents (toluene, dibutyl phthalate, tetrahydrofuran, and acetonitrile). Quenching the quinone (Q) triplet with amine in low-polarity solvents gives rise to short-lived complexes with complete charge transfer.