A Laser Photolysis Study of Triplet Lifetimes and of Triplet–Triplet Annihilation Reactions of Phthalocyanins in DMSO Solutions(Etude des Durées de Vie du Triplet et des Réactions d′Annihilation Triplet–Triplet de Phthalocyanines dans le DMSO par Photolyse Laser)

Triplet decay of Mg and Zn phthalocyanins have been studied by laser flash photolysis as a function of concentration. The triplet decay mechanism changes from a near first order in dilute solution to an almost second order in concentrated solutions. This is interpreted in terms of triplet–triplet re... View More