INFLUENCE OF BROMINATION ON ACTIVITY OF PHOTOSENSITIZATION OF HYPOCRELLIN B

Zhang Hongyu; Zhang Zhiyi; Wan Qian; Wang Dahui

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INFLUENCE OF BROMINATION ON ACTIVITY OF PHOTOSENSITIZATION OF HYPOCRELLIN B

更新时间：2023-04-23

- INFLUENCE OF BROMINATION ON ACTIVITY OF PHOTOSENSITIZATION OF HYPOCRELLIN B
- Journal of Radiation Research and Radiation Processing Vol. 15, Issue 2, Pages: 75-79(1997)
- 作者机构：
  
  1.中国科学院生物物理研究所　北京　100101
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Zhang Hongyu, Zhang Zhiyi, Wan Qian, et al. INFLUENCE OF BROMINATION ON ACTIVITY OF PHOTOSENSITIZATION OF HYPOCRELLIN B. [J]. Journal of Radiation Research and Radiation Processing 15(2):75-79(1997)
DOI：

Zhang Hongyu, Zhang Zhiyi, Wan Qian, et al. INFLUENCE OF BROMINATION ON ACTIVITY OF PHOTOSENSITIZATION OF HYPOCRELLIN B. [J]. Journal of Radiation Research and Radiation Processing 15(2):75-79(1997) DOI：

摘要

在DMF-水体系中用自旋捕捉、消自旋等ESR技术测定了竹红茵乙素（HB）及其两种溴代物（5-Br-HB和5,8-diBr-HB）光敏产生,1,O,2,、O,2,•-,及负离子自由基的相对产额，发现单溴代未增加HB ,1,O,2,的产额，而二溴代使HB,1,O,2,的产额增加20%左右，但同时降低其经电子转移产生O,2,•-,和负离子自由基的能力。

Abstract

In this paper,ESR techniques of spin trapping and spin counteraction were used to determine the relative yields of ,1,O,2,O,2,·-, and anion radical produced during photosensitization of hypocrellin B (HB) and its brominated products (5—Br—HB and 5,8—diBr—HB). It was found that monobromination did not increase the yield of ,1,O,2, of HB and dibromination enhanced the yield of ,1,O,2, about 20%,but decreased its ability of generating O,2,•-, and anion radical through electron transfer at same time.

关键词

竹红菌乙素（HB）竹红菌乙素溴代物（5-Br-HB和58-diBr-HB）光敏活性ESR自旋捕捉消自旋

Keywords

Hypocrellin BBrominated HBPhotosensitizationESRSpin trappingSpin counteraction

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