Detection of Hydrogen Peroxide Photogenerating from a Hypocrellin B Derivative天津大学学报：英文版论文
【题名】：Detection of Hydrogen Peroxide Photogenerating from a Hypocrellin B Derivative天津大学学报：英文版论文(Detection of Hydrogen Peroxide Photogenerating from a Hypocrellin B DerivativeTianJinDaXueXueBao：YingWenBanLunWen) 【关键词】：HB 5,8－di－Br－HB 铝配合物 催化机理 电子顺磁共振 羟自由基 过氧化氢 光敏活性 【keywords】：HB 5,8－di－Br－HB LvPeiHeWu CuiHuaJiLi DianZiShunCiGongZhen ZuoZiYouJi GuoYangHuaQing GuangMinHuoXing 【作者】：刘光艳,马江华,      【来源】： 知识词典 【期刊名称】：天津大学学报：英文版(TianJinDaXueXueBao：YingWenBan) 【国际标准刊号】：1006-4982        【国内统一刊号】：12-1248 【作者单位】：[1]BinzhouProfessionalCollege,BinzhouCity256609,ShandongProvince,China [2]CenterforMolecularScience,InstituteofChemistry,ChineseAcademyofSciences,Beijing100080,China([1]BinzhouProfessionalCollege,BinzhouCity256609,ShandongProvince,China [2]CenterforMolecularScience,InstituteofChemistry,ChineseAcademyofSciences,Beijing100080,China) 【分类号】：O643.3      【页码】：-144-147      【出版年】：2003.2 【下载地址】：下载pdf全文         In order to further improve the photosensitizing activity of hypocrellinB(HB),the complex of 5,8-di-Br-HB with Al^3+ was designed and synthesized in high yield.The complex of aluminium ion with 5,8-di-Br-HB is a new water-soluble perylenequinonoid derivative with enhanced absorption over HB in the phototherapeutic window(600-900nm).Electron paramagnetic resonance(EPR) measurement and 9,10-diphenyl-anthracene bleaching methods were used to investigate the phtosensitizing activity of [Al2(5,8-di-Br-HB)Cl4]n in the presence of oxygen.Singlet oxygen,superoxide anion radical,hydroxyl radical can be generated by [Al2(5,8-di-Br-HB)Cl4]n photosensitization.The results showed that the production of hydroxyl radical(·OH)by [Al2(5,8-di-Br-HB)Cl4]n photosensitization comes from the Fenton Haber-Weiss reaction and the decomposition of DMPO-^1O2 adduct.Formation of H2O2 as one of main intermediates in the photogeneration of hydroxyl radical was detected by using the catalyzed oxidation of the DPD reagent by the POD enzyme method.Moreover,the experiments of EPR spin trap and catalase enzyme excluded the effect of organoperoxide on DPD oxidization.These results further support the proposed machanism of ·OH formation.
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