HYPOCRELLIN A SENSITIZED PHOTOOXIDATION OF BILIRUBIN IN APROTIC SOLVENT

doi:10.7517/j.issn.1674-0475.1991.01.58

Imaging Science and Photochemistry ›› 1991, Vol. 9 ›› Issue (1): 58-61.DOI: 10.7517/j.issn.1674-0475.1991.01.58

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HYPOCRELLIN A SENSITIZED PHOTOOXIDATION OF BILIRUBIN IN APROTIC SOLVENT

MA JIN-SHI, WANG CHANG-QI, YAN FANG

Institute of Photographic Chemistry, Acadcmta Sinica, Beijing 100101, P.R. China

Received:1989-03-10 Revised:1989-10-09 Online:1991-02-20 Published:1991-02-20

Abstract

Abstract: Hypocrellin A sensitized photooxidation of bilirubin in aprotic solvent, dichlorometh-ane, gave biliverdin and other degraded molecules. The yield of biliverdin was varied with concentration of bilirubin, irradiation time and light intensity. A highest yield was readied to 58%. The photooxidation pathway is ¹O₂ intermediated Type II, ‘ene addition’ of singlet oxygen at C10-C12 of bilirubin via bis-free radical intermediate may lead to formation of biliverdin.

Key words: bilirubin, biliverdin, hypocrellin A, dichloromethane, photooxidation

MA JIN-SHI, WANG CHANG-QI, YAN FANG. HYPOCRELLIN A SENSITIZED PHOTOOXIDATION OF BILIRUBIN IN APROTIC SOLVENT[J]. Imaging Science and Photochemistry, 1991, 9(1): 58-61.

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HYPOCRELLIN A SENSITIZED PHOTOOXIDATION OF BILIRUBIN IN APROTIC SOLVENT

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