中国科学B辑(英文版)
中國科學B輯(英文版)
중국과학B집(영문판)
SCIENCE IN CHINA(SCIENTIA SINICA)
2003年
1期
57-63
,共7页
赵文恩%姚思德%王强%钱素平%王文峰%韩雅珊
趙文恩%姚思德%王彊%錢素平%王文峰%韓雅珊
조문은%요사덕%왕강%전소평%왕문봉%한아산
bixin%β-carotene%lycopene%trichloromethyl peroxyl radical%pulse radiolysis%transient absorption
The interactions of carotenoids (bixin, β-carotene and lycopene) with CCl3OO@ in aqueous and i-propylalcohol solution saturated with air have been studied by pulse radiolysis. For bixin and β-carotene reaction products from forming process, absorbing in the region of 650 nm, is observed with concomitant carotenoid bleaching (bixin at 500 nm, β-carotene at 450 nm). Their rate constants from forming process are 1.78×108 and 7.8×107 mol-1@L@s-1 respectively. However, in the case of lycopene, no such a forming process of reaction as bixin and β-carotene can be observed although there is the bleaching reaction (rate constant 4×107 mol-1@L@s-1). The results suggest that the carotenoid radical cationand an additional radical are produced in the case of bixin and β-carotene, whereas lycopene undergoes electron transfer with CCl3OO@, forming cation radical.
