Reaction of carotenoids with CCl3OO by using pulse radiolysis

文献类型： 外文期刊

第一作者： Zhao, WN

作者： Zhao, WN;Yao, S;Wang, Q;Qian, SP;Wang, WF;Han, YS

作者机构：

关键词： bixin;beta-carotene;lycopene;trichloromethyl peroxyl radical;pulse radiolysis;transient absorption

期刊名称：SCIENCE IN CHINA SERIES B-CHEMISTRY （ 影响因子：1.199； 五年影响因子：1.094 ）

ISSN： 1006-9291

年卷期： 2003 年 46 卷 1 期

页码：

收录情况： SCI

摘要： The interactions of carotenoids (bixin, P-carotene and lycopene) with CCl3OO. in aqueous and i-propylalcohol solution saturated with air have been studied by pulse radiolysis. For bixin and beta-carotene reaction products from forming process, absorbing in the region of 650 nm, is observed with concomitant carotenoid bleaching (bixin at 500 nm, beta-carotene at 450 nm). Their rate constants from forming process are 1.78 X 10(8) and 7.8 X 10(7) mol(-1) . L . s(-1) respectively. However, in the case of lycopene, no such a forming process of reaction as bixin and beta-carotene can be observed although there is the bleaching reaction (rate constant 4 X 107 mol(-1) . L . s(-1)). The results suggest that the carotenoid radical cation and an additional radical are produced in the case of bixin and-p-carotene, whereas lycopene undergoes electron transfer with CCl3OO., forming cation radical.

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