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

Chemical Research in Chinese Universities ›› 2005, Vol. 21 ›› Issue (2): 196-200.

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

HONG Fa-shui¹, YANG Ping², GAO Feng-qing¹, LIU Chao¹, ZHENG Lei¹, ZHOU Juan¹

1. College of Life Sciences;
2. College of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, P. R. China

Received:2004-06-21 Online:2005-03-24 Published:2011-07-27
Supported by:
Supported by the Natural Science Foundation of Jiangsu Province Universities of China(No.03KJB180122).

Abstract

Abstract: 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.

Key words: Nano-anatase TiO₂, Spinach, Photosystem Ⅱ, Spectral characterization

HONG Fa-shui, YANG Ping, GAO Feng-qing, LIU Chao, ZHENG Lei, ZHOU Juan. Effect of Nano-anatase TiO₂ on Spectral Characterization of Photosystem Ⅱ Particles from Spinach[J]. Chemical Research in Chinese Universities, 2005, 21(2): 196-200.

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

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