Magnetic Resonance Research On Photoexcited And Static Interaction In Mimic Of Photosynthesis

Photosynthesis is the most important chemical reaction on the earth For years, significant emphasis has been put on developing an understanding of photoinduced electron transfer. In this paper, electron transfer in mimic of photosynthesis and the kinetics of trans-vesicle electron transfer were studied by using the Chemical Induced Dynamic Nuclear Polarization(CIDNP) and Electron Spin Resonance(ESR) technique. The reaction mechanism and the dynamic were investigated Some results were obtained as the following:1. Investigation on the photo-induced reaction mechanism of porphyrin/benzoquinonePoiphyrin/benzoquinone/CK3OD and benzoquinone/CDsOD were studied by CIDNP and ESR technique. The results supported a new mechanism that excited benzoquinone can abstract hydrogen H from proton donor under photo-irradiation.2. Investigation on the photo-induced reaction mechanism of porphyrin/benzoquinone/imidazolePomhyrin/benzoquinone/irnidazole was studied in the various solvent and under the various light source by CIDNP technique, which indicated that the second-electron transfer process has been proceeded3. NMR study on static interaction in imidazole/quinoneImidazole/benzoquinone and imidazole/tetrachlorobenzoquinone were researched by using the NMR technique. The results show that an intermolecular hydrogen bonding interaction between imidazole and quinone. 4. Research on the kinetics of trans-vesicle electron transfer process across small unimolecular vesiclesTrans-vesicle photoinduced electron transfer reaction was explored in the photosynthesis mimic of TPP/DODAC and HA/DODAC small unimolecular vesicle aqueous solution. Long life charge separated state was achieved, which illustrated that vesicle system can used as valuable photosynthesis model.