Effect of Nano-anatase TiO2 on Spectral Characterization of Photosystem Ⅱ Particles from Spinach |
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作者姓名: | HONGFa-shui YANGPing GAOFeng-qing LIUChao ZHENGLei YANGFan ZHOUJuan |
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作者单位: | [1]CollegeofLifeSciences [2]CollegeofChemistryandChemicalEngineering,SuzhouUniversity,Suzhou215006,P.R.China |
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基金项目: | theNaturalScienceFoundationofJiangsuProvinceUniversitiesofChina(No.03KJB180122). |
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摘 要: | The photosystem Ⅱ (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 Ⅱ are accelerated after it has been treated with nano-anatase TiO2; the UV-Vis absorption spectrum of PS Ⅱ particles is increased; the red shift of fluorescence emission peak of PS Ⅱ is 2 nm; the peak intensity is decreased; the PS Ⅱ signal Ⅱ s of low temperature electron paramagnetic resonanace(EPR) spectrum is intensified under light, and the PS Ⅱ circular dichroism(CD) spectrum is similar to that of control. It is suggested that nano-anatase TiO2 might bind to the PS Ⅱ reaction center complex and intensify the function of the PS Ⅱ electron donor, however, nano-anatase TiO2 treatment does not change the configuration of the PS Ⅱ reaction center complex.
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关 键 词: | PS TiO2 EPR UV-Vis |
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