Electron Transfer between Covalently Linked Porphyrin and Quinone Units: Synthesis, Magnetic Resonance and Picosecond Fluorescence Spectroscopy

Abstract

Quinones covalently linked with porphyrin like 1 are suitable for investigating light-induced charge separation in the primary process of photosynthesis. The orientation of the ring units was determined by NOE and ENDOR measurements on the Zn-cyclohexylporphyrin and cyclohexylquinone. Detailed MO calculations on Zn-1 and picosecond fluorescence measurements gave satisfactorily consistent rate constants for the electron transfer from the prophyrin to the quinone.