卷烟烟气中活性自由基的自旋捕获ESR研究  

Spin Trapping-ESR Study on Free Radicals in Cigarette Smoke

作　　者：吕玉光[1] 严宝珍[2] 田秋[1] 赵明月[3] 聂聪[3] 曾波[3] 刘阳平[1] 刘扬[1] 

机构地区：[1]中国科学院化学研究所 [2]北京化工大学理学院,北京100029 [3]郑州烟草研究院,河南郑州450003

出　　处：《波谱学杂志》2005年第1期21-25,共5页Chinese Journal of Magnetic Resonance

基　　金：国家烟草专卖局科技项目(国烟科[2001]504号)

摘　　要：卷烟烟气中的瞬态自由基对人体健康是相当有害的, 而检测活性自由基最常用的方法是自旋捕获方法. 本研究中使用高效新型捕捉剂 DEPMPO能够直接在水相中捕捉到烷基自由基与羟基自由基, 并未发现烷氧自由基加合物. 考虑到 DEPMPO对活性自由基的捕捉能力和加合物ESR谱图解析特征性都优于PBN与 DMPO, 且在有机溶剂中溶解较多的氧分子. 因此认为以往文献中所捕获的烷氧自由基来源于烷基自由基氧化后的次级自由基产物.It is known that free radicals in cigarette smoke do harm to the human health The most common way to detect the reactive free radicals is electron spin resonance (ESR) spectroscopy in conjunction with the spin trapping method In this paper with a highly efficient and novel spin trap DEPMPO, the alkyl radicals and hydroxyl radical were obtained in the aqueous medium, among of which no adducts of alkoxyl radicals were discovered In view of the fact that more oxygen molecule dissolved in organic solvents as well as the priority of the ability of DEPMPO in capturing reactive free radicals and its character of ESR spectrum to those of PBN and DMPO, we considered that the trapped alkoxyl radicals in the previous paper may derive from the secondary radical products by oxidation of alkyl radicals

关 键 词：氧自由基 活性自由基 卷烟烟气 人体健康 ESR谱 研究 发现 自旋 烷基 谱图 

分 类 号：O572[理学—粒子物理与原子核物理] R285.1[理学—物理]