Zhu Hongping, Zhao Hongwei, Zhang Zhaoxia, Wang Wenfeng, Yao Side
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
Radiat Environ Biophys. 2006 May;45(1):73-7. doi: 10.1007/s00411-006-0041-8. Epub 2006 Apr 28.
The antioxidant properties of hydroxycinnamic acid derivatives (HCA) were studied by laser flash photolysis. The transient species with maximum absorption at 360 nm were assigned to the phenoxyl radical of HCA. The SO (4) (.-) induced oxidation of HCA was also investigated. It was shown that the interaction of SO (4) (.-) with HCA resulted in the formation of HCA phenoxyl radicals with rate constants of 2.0-3.9 x 10(9 )M(-1) s(-1). The reactions of HCA with triplet state of benzophenone were analyzed and quenching rate constants of 4.3-7.8 x 10(9 )M(-1) s(-1) were determined.
通过激光闪光光解研究了羟基肉桂酸衍生物（HCA）的抗氧化性能。在360nm处具有最大吸收的瞬态物种被认为是HCA的苯氧自由基。还研究了SO(4)(.-)诱导的HCA氧化。结果表明，SO(4)(.-)与HCA的相互作用导致形成HCA苯氧自由基，速率常数为2.0 - 3.9 x 10(9 )M(-1) s(-1)。分析了HCA与二苯甲酮三重态的反应，并确定了猝灭速率常数为4.3 - 7.8 x 10(9 )M(-1) s(-1)。
