Mechanisms of interchromophore interactions and relaxation of electron excitation energy in covalently bound porphyrin dimers

Abstract

The results presented in the work and the conclusions made on their basis show that the directed synthesis of covalently bound dimers of porphyrins and chlorins with required structural and energy properties of their components allows determination and investigation of real concrete mechanisms determining deactivation of electron excitation energy in these systems and, consequently, control of the interaction of this kind of object with molecular oxygen. The results obtained can be used in practice for seeking effective quenchers (as well as sensitizers) of singlet oxygen for inhibition of its destructive role in biological systems and for protecting materials from oxidation. Finally, the authors have shown recently that a combination of the methods of chemical synthesis with the principles of supermolecular chemistry is promising in forming self-organizing trimer and pentamer complexes with effective energy and electron transfer in solutions.