ADVANCED EPR SPECTROSCOPY ON ELECTRON-TRANSFER PROCESSES IN PHOTOSYNTHESIS AND BIOMIMETIC MODEL SYSTEMS

This review focuses on the recent advances in EPR spectroscopy as they are applied both to photoinduced electron transfer in the photosynthe tic apparatus and to biomimetic systems. The review deals with time-re solved direct-detection cw and pulsed EPR and ENDOR methods, both at c onventional bands [X-(9.5 GHz), K-(24 GHz), and Q-(35 GHz)] and at hig h frequency bands (W-band, 95 GHz, and even highter frequency bands). EPR studies on photosynthetic and model systems in their doublet, trip let and radical pair states are surveyed, including their static and d ynamic properties. Applications of time-resolved EPR in studying photo induced electron and energy transfer in isotropic and anisotropic envi ronments, and the concepts of electron spin polarization and magnetic held effects in photochemical reactions are also reviewed.