Energy Migration. The Energy Hopping and Self-Quenching Reaction Involving Carbonyl Chromophores.

摘要

The migration of triplet excitation energy among formally identical carbonyl groups in acetonitrile was investigated. Advantage was taken of the special chemiluminescent properties of tetramethyl-dioxetane. It was found that energy transfer from triplet acetone to the ground state of the aliphatic carbonyl compounds investigated occured with a rate constant of ca. 1,000,000/m-sec essentially independent of the steric constraints of the acceptor. Unlike many other carbonyl compounds it was determined that the self-quenching rate constant of acetone triplet was less than 1,000/m-sec. (Author)