Quenching of excited 1 B 2u and 3 B 1u benzene vapour by halogenated compounds

Abstract

The rate constants for quenching of the ¹B_2u and ³B_1u excited states of benzene in the vapour phase by various halogenated compounds have been evaluated by studies of the quenching of fluorescence of benzene vapour, and of the phosphorescence arising from benzene–biacetyl mixtures. In all cases, the rate constant for singlet quenching is found to be much greater than that for triplet quenching.