Study Of Interaction Of P-Benzoquinone Likes With Imidazole Under Ground State In Photosynthesis Model System

Photosynthesis is the most chemical reaction on the earth, which excites the interest of biologists and chemists. During the lots of research of photosynthesis system, there are a large number of chemists who are engaged in the research of electron transfer procedures among the photosynthesis model system.In this thesis, the interactions of p-benzoquinone, 2,5-dicholorbenzoquinone and Tetrachloro-p-benzoquinone with imidazole which are the basic photosynthesis model system were studied by UV-Vis, NMR, IR, MS and XPS analytical methods under ground state systematicly. At the same time, the Time-Resolved CIDNP technique was also investigated . The main results were obtained as following:1. 1H-NMR study of p-benzoquinone / imidazole model system under ground stateP-benzoquinone / imidazole model system was studied under ground state by 1H-NMR method. The hydrogen bonding between p-benzoquinone and imidazole was observed under ground state.2. Study of interaction of p-benzoquinone with imidazole in CH3CN under ground stateThe results show that the reaction of p-benzoquinone with imidazole undergoes a charge transfer complex transition state at first, then produces hydroquinone and 2,5-Bis (imidazol-1-yl) hydroquinone.3. Study of interaction of tetrachloro-p-benzoquinone with imidazole and N-methylimidazole under ground state1:2 CA-Im CTC was observed in the reaction of tetrachloro-p-benzoquinone with imidazole in CH2Cl2 for the first time. The CA-Im CTC was isolated and characterized. At the same time, the interaction of tetrachloro-p-benzoquinone with N-methylimidazole under ground state was also investigated, the result shows that 1:1 CA-NMIm CTC was formed. During the whole experiments there were no solvent polarity effects.4. Preliminary study of interaction of 2,5-dicholorbenzoquinone with imidazole in CH3CN under ground stateThe UV-Vis and time-resolved 1H-NMR experiments show that the reaction of 2,5-dicholorbenzoquinone with imidazole is much complicated. Not only CTC ,but also other products were formed.5. Investigation on the Time-Resolved CIDNP techniqueThe preliminary Time-Resolved CIDNP device was established on the Varian Unity200 FT-NMR spectrometer.