Abstract

In relation to the mechanisms of photoinduced electron transfer (ET) and charge separation processes in biological photosynthetic systems, investigations on porphyrin-electron acceptor model systems have been made quite extensively.¹ Contrary to the biological photosynthetic systems, where ET from excited singlet chlorophyll donors to near-by acceptors takes place on a ps time scale quite efficiently leading to a complete charge separation, the solvated radical ions or ET states produced from the S₁ state were not detected even by means of pslaser spectroscopy in the case of intermolecular porphyrin-quinone exciplex systems in strongly polar solvents.

© 1984 Optical Society of America