LIGHT-INDUCED ELECTRON-TRANSFER AND CHARGE SEPARATION OF PORPHYRIN COMPOUNDS FOR PHOTOELECTRIC CONVERSION

A series of artificial photosynthesis porphyrin compounds consisting o f electron donor and electron acceptor (compounds 1-6) were synthesize d. Their spectroscopic behaviors in solution were investigated and the synthetic molecular devices were prepared with these molecules by usi ng LB technique. It was indicated that multistep electron transfer and charge separation for these compounds actually occur, which is of gre at advantage to their photoelectric conversion. An efficient energy tr ansfer process takes place for compound 6. A mechanism involving photo induced electron transfer and multistep charge separation for these co mpounds was suggested. With only one monolayer of tetrad 1 LB film on the surface of SnO2 conductive glass, high photo-driven voltage and cu rrent were obtained.