PHOTOINDUCED ELECTRON-TRANSFER AND ITS APPLICATIONS - STUDY ON PHOTOCHEMICAL SOLAR-ENERGY STORAGE AND POLYMERIC PHOTOREFRACTIVE MATERIALS

The applications of photoinduced electron transfer, one in solar energ y storage and the other in polymeric photorefractive materials are rep orted. In the former case, two new kinds of polymers containing norbor nadiene and carbazole pendants were synthesized. The photoisomerizatio n of norbornadiene pendants were achieved by irradiation with the ligh t above the wavelength of 350 nm and a photoinduced electron transfer mechanism was proposed via fluorescence quenching, chemically induced dynamic nuclear polarization and thermodynamic discussion. In the latt er case, a fast photorefractive response time of a polymer film compos ed of poly(N-vinylcarbazole), 2,4,7-trinitro-9-fluorenone and 4-(dicya novinyl)-N,N-diethylaniline was observed by four-wave mixing diffracti on measurement and the function of photoinduced electron transfer proc ess in this photorefractive polymer film was also illustrated.