COMPARISON OF PHOTOSENSITIZATION BETWEEN HYPOCRELLIN A AND CERCOSPORIN IN HOMOGENEOUS AND HETEROGENEOUS SYSTEM

doi:10.7517/j.issn.1674-0475.1996.02.144

Imaging Science and Photochemistry ›› 1996, Vol. 14 ›› Issue (2): 144-149.DOI: 10.7517/j.issn.1674-0475.1996.02.144

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COMPARISON OF PHOTOSENSITIZATION BETWEEN HYPOCRELLIN A AND CERCOSPORIN IN HOMOGENEOUS AND HETEROGENEOUS SYSTEM

ZHANG Hongyu, ZHANG Zhiyi, WANG Dahui, LI Meifen

Institute of Biophysics, The Chinese Academy of Sciences, Beijing 100101, P. R. China

Received:1995-09-28 Revised:1996-01-05 Online:1996-05-20 Published:1996-05-20

Abstract

Abstract: In this paper,ESR,spin trapping and spin counteraction are used to study the photosensitization of hypocrellin A(HA) and cercosporin(CP) in homogeneous and heterogeneous systems separately. The relative yields of ¹O₂,anion radical,O₂^·-and·OH,produced during photosensitization,are determined,It is found that in homogeneous system,HA is a littie more active than CP,which indicates that side chain has little effect on the activity of photosensitization and in heterogeneous system,due to stronger protective effect of micelle on excited state of HA,the activity of HA is much higer than that of CP.

Key words: hypocrellin A, cercosporin, ESR, spin trapping, spin counteraction, photosensitivity, TX-100 micelle

ZHANG Hongyu, ZHANG Zhiyi, WANG Dahui, LI Meifen. COMPARISON OF PHOTOSENSITIZATION BETWEEN HYPOCRELLIN A AND CERCOSPORIN IN HOMOGENEOUS AND HETEROGENEOUS SYSTEM[J]. Imaging Science and Photochemistry, 1996, 14(2): 144-149.

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COMPARISON OF PHOTOSENSITIZATION BETWEEN HYPOCRELLIN A AND CERCOSPORIN IN HOMOGENEOUS AND HETEROGENEOUS SYSTEM

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