PHOTOSENSITIZED OXIDATION OF 7-DEHYDROCHOLESTEROL BY NAFION-LOADED PLATINUM(Ⅱ) TERPYRIDYL ACETYLIDE COMPLEX

doi:10.7517/j.issn.1674-0475.2003.06.405

Imaging Science and Photochemistry ›› 2003, Vol. 21 ›› Issue (6): 405-411.DOI: 10.7517/j.issn.1674-0475.2003.06.405

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PHOTOSENSITIZED OXIDATION OF 7-DEHYDROCHOLESTEROL BY NAFION-LOADED PLATINUM(Ⅱ) TERPYRIDYL ACETYLIDE COMPLEX

ZHANG Dong, WU Li-zhu, ZHANG Li-ping, TUNG Chen-ho(TONG Zhen-he)

Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, P.R. China

Received:2003-07-02 Revised:2003-07-10 Online:2003-11-23 Published:2003-11-23

Abstract

Abstract: Photosensitized oxidation of 7 dehydrocholesterol in methanol and dichlormethane by Nafion membrane loaded Platinum(Ⅱ) terpyridyl acetylide (1) was investigated.In comparison with photosensitization in homogeneous solution,Nafion membrane loaded sensitizer can be easily separated from products,unreacted materials,and solvent,and can be reused in many recycles without loss of activity.Although a fraction of generated singlet oxygen is quenched during the course of diffusion from the Nafion membrane to the bulk solution,the overall quantum yield of product formation is still reasonable,and can be further enhanced by using a small amount of deuterium solvent.

Key words: photosensitized oxidation, Nafion-loaded platinum(Ⅱ) terpyridyl acetylide(1), 7-dehydrocholesterol

CLC Number:

ZHANG Dong, WU Li-zhu, ZHANG Li-ping, TUNG Chen-ho(TONG Zhen-he). PHOTOSENSITIZED OXIDATION OF 7-DEHYDROCHOLESTEROL BY NAFION-LOADED PLATINUM(Ⅱ) TERPYRIDYL ACETYLIDE COMPLEX[J]. Imaging Science and Photochemistry, 2003, 21(6): 405-411.

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PHOTOSENSITIZED OXIDATION OF 7-DEHYDROCHOLESTEROL BY NAFION-LOADED PLATINUM(Ⅱ) TERPYRIDYL ACETYLIDE COMPLEX

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