SEARCH Articles Figures Tables Electron Spin Resonance Spectroscopy, Application of to Photochemistry (Wan) Electron transfer, photochemistry Photochemistry electron transfer systems Photochemistry electronic spectra Photochemistry four-electron systems Photochemistry intermolecular electron transfer reactions Photochemistry photo-electron transfer Photochemistry three-electron systems Porphyrin photochemistry electron transfer systems Porphyrin photochemistry photoinduced electron transfer Potential Energy Surfaces for Ground-State Electron Transfer. Relation to Photochemistry Nonadiabatic Chemistry