影像科学与光化学 ›› 1991, Vol. 9 ›› Issue (1): 58-61.DOI: 10.7517/j.issn.1674-0475.1991.01.58

• 研究简报 • 上一篇    下一篇

在非质子溶剂中竹红菌甲素敏化光氧化胆红素

马金石, 王昌琦, 阎芳   

  1. 中国科学院感光化学研究所, 北京 100101
  • 收稿日期:1989-03-10 修回日期:1989-10-09 出版日期:1991-02-20 发布日期:1991-02-20
  • 通讯作者: 马金石
  • 基金资助:
    国家自然科学基金

HYPOCRELLIN A SENSITIZED PHOTOOXIDATION OF BILIRUBIN IN APROTIC SOLVENT

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

  1. 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

摘要: 胆红素IXα(胆红素)是哺乳动物体内血红素的代谢产物,由于它与小儿黄疸病光疗的直接关系,以及近来发现它在体内可能作为生物抗氧剂,所以一直受到科学家的重视。在非质子溶剂中胆红素的光氧化可以生成胆绿素IXα(胆绿素)及一系列单吡咯、双吡咯的衍生物。对于生成单、双吡咯小分子衍生物,用类型Ⅱ(1O2为中间体)的光氧化机制很好解释,但对胆绿素的生成到底是经过单重态氧途径,还是离子自由基途径尚不完全清楚。

关键词: 胆红素, 胆绿素, 竹红菌甲素, 二氯甲烷, 光氧化

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