Intramolecular Quenching of Carbonyl Triplets by β-Phenyl Rings

Article abstract of DOI:10.1021/j150645a028

The presence of a phenyl ring in a position β to the carbonyl of a phenyl alkyl ketone results in greatly reduced ketone triplet lifetimes.For example, in deaerated benzene solutions, triplet lifetimes were 2700 and 0.89 ns for propiophenone (P) and β-phe