脉冲辐解研究吩噻嗪与CCl_3OO~·、~·OH的反应  

Pulse Radiolysis Study of the Reactions between Phenothiazine and CCl_3OO~·,~·OH

作　　者：唐睿智[1,2] 张鹏[1,2] 李海霞[1,2] 刘艳成[1,2] 王文锋[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院研究生院,北京100049

出　　处：《物理化学学报》2011年第8期1975-1978,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(10675158)资助项目~~

摘　　要：采用纳秒级脉冲辐解技术研究了吩噻嗪与CCl3OO·、·OH的反应,提出了相应的反应机理,得到了相关的反应速率常数.研究结果表明:吩噻嗪与CCl3OO·、·OH反应得到的瞬态产物的最大吸收峰都位于380nm左右,该吸收峰归属于CCl3OO·、·OH夺取吩噻嗪氮原子上的氢而产生的吩噻嗪氮自由基.吩噻嗪与CCl3OO·、·OH反应的速率常数分别为1.1×109和4.0×109L.mol-1.s-1.这些结果将为进一步研究吩噻嗪的抗氧化活性提供理论基础.The kinetics and mechanisms of the reactions between phenothiazine and CCI3OO·, ·OH were evaluated and the related rate constants were determined using nanosecond pulse radiolysis technique. The experimental results indicate that the maximum absorption of the transient product from the reaction between phenothiazine and CCI3OO·, ·OH was located at 380 nm, which is attributed to CCI3OO· and ·OH abstracting hydrogen from phenothiazine to generate a phenothiazine radical. The rate constants of the reactions between phenothiazine and CCI3OO＇, ＂OH were determined to be 1.1 × 10^9, 4.0× 10^9 L. mol^-1, s^-1, respectively. These results provide a theoretical foundation for the further study of the antioxidant activity of phenothiazine.

关 键 词：抗氧化剂 吩噻嗪 三氯甲基过氧自由基 羟基自由基 脉冲辐解 

分 类 号：O644.2[理学—物理化学]