Effect of Nano-anatase TiO2 on Spectral Characterization of Photosystem Ⅱ Particles from Spinach

The photosystem I (PS Ⅱ) particles were purified by means of nano-anatase TiO2 treatment of spinach and studied by spectroscopy. The results show that the electron transport and the oxygen-evolving rate of PS I are accelerated after it has been treated with nano-anatase TiO2; the UV-Vis absorption spectrum of PS I particles is increased; the red shift of fluorescence emission peak of PS I is 2 nm; the peak intensity is decreased; the PS Ⅱ signal I s of low temperature electron paramagnetic resonanace(EPR) spectrum is intensified under light, and the PS I circular dichroism(CD) spectrum is similar to that of control. It is suggested that nano-anatase TiO2 might bind to the PS I reaction center complex and intensify the function of the PS I electron donor, however, nano-anatase TiO2 treatment does not change the configuration of the PS Ⅱ reaction center complex.

作 者： HONG Fa-shui YANG Ping GAO Feng-qing LIU Chao ZHENG Lei YANG Fan ZHOU Juan   作者單位：   刊 名： 高等學�；瘜W研究（英文版）  ISTIC SCI 英文刊名： CHEMICAL RESEARCH IN CHINESE UNIVERSITIES  年，卷(期)： 2005 21(2)  分類號： O6  關鍵詞： Nano-anatase TiO2   Spinach   Photosystem I   Spectral characterization  

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