【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１Ｏ２、Ｏ·－２及负离子自由基的相对产额，发现单溴代未增加ＨＢ１Ｏ２的产额，而二溴代使ＨＢ１Ｏ２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。更多还原

【Abstract】 In this paper, ESR techniques of spin trapping and spin counteraction were used to determine the relative yields of 1O 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 1O 2 of HB and dibromination enhanced the yield of 1O 2 about 20%, but decreased its ability of generating O ·- 2 and anion radical through electron transfer at same time.更多还原