Interaction of hydroxycinnamic acid derivatives with the Cl3COO radical: A pulse radiolysis study

The electron transfer reactions between the trichloromethylperoxyl radical (Cl3COO·) and hydroxycinnamic acid derivatives, including chlorogenic acid, sinapic acid, caffeic acid, ferulic acid and 3,4-(methylenedioxy)cinnamic acid, have been studied by pulse radiolysis. The hydroxycinnamic acid deriv...

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Published in:Free radical research 1999-01, Vol.30 (3), p.241-245
Main Authors: Pan, Jing-Xi, Wang, Wen-Feng, Lin, Wei-Zhen, Lu, Chang-Yuan, Han, Zhen-Hui, Yao, Si-De, Lin, Nian-Yun
Format: Article
Language:English
Subjects:
antioxidant
Antioxidants - chemistry
Coumaric Acids - chemistry
electron transfer
Electron Transport
Free Radicals - chemistry
Hydrocarbons, Chlorinated - chemistry
Hydroxycinnamic acid derivatives
In Vitro Techniques
Kinetics
Pulse Radiolysis
Spectrophotometry
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Summary:The electron transfer reactions between the trichloromethylperoxyl radical (Cl3COO·) and hydroxycinnamic acid derivatives, including chlorogenic acid, sinapic acid, caffeic acid, ferulic acid and 3,4-(methylenedioxy)cinnamic acid, have been studied by pulse radiolysis. The hydroxycinnamic acid derivatives, especially sinapic acid, are identified as good antioxidants for reduction of Cl3COO· via electron transfer reactions. From buildup kinetic analysis of phenoxyl radical, the rate constant for reaction of Cl3COO· with sinapic acid has been determined to be 8.2 × 107 dm3 mol-1 s-1, while the rate constants of electron transfer from other hydroxycinnamic acid derivatives to Cl3COO· were obtained to be about 2 × 107dm3 mol-1 s-1. The reaction of 3,4-(methylenedioxy)cinnamic acid with Cl3COO· was investigated as an evidence for the electron transfer mechanism.
ISSN:1071-5762
1029-2470
DOI:10.1080/10715769900300261