Study of the transfer of electrons and hydrogen atoms between substituted p-benzoquinone triplets and diphenyamine by flash-photolysis methods

Abstract

1. The formation of radical ions and neutral radicals during the quenching of substituted p-benzoquinone triplets by diphenylamine in nonsolvating polar solvents proceeds through competing reactions in the collision complex. 2. The lifetimes and radii of the radical ion pairs formed in the quenching of the substituted p-benzoquinones by diphenylamine have been estimated. 3. The value of the rate constant for the hydrogen atom transfer during quenching of the substituted p-benzoquinone triplets by diphenylamine falls off with an increase in the electron-acceptor activity of the quinone.