Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (08): 1975-1978.doi: 10.3866/PKU.WHXB20110825

• PHOTOCHEMISTRY AND RADIATION CHEMISTRY • Previous Articles     Next Articles

Pulse Radiolysis Study of the Reactions between Phenothiazine and CCl3OO·, ·OH

TANG Rui-Zhi1,2, ZHANG Peng1,2, LI Hai-Xia1,2, LIU Yan-Cheng1,2, WANG Wen-Feng1   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049
  • Received:2011-04-26 Revised:2011-06-08 Published:2011-07-19
  • Contact: WANG Wen-Feng E-mail:wangwenfeng@sinap.ac.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (10675158).

Abstract:

The kinetics and mechanisms of the reactions between phenothiazine and CCl3OO·, ·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 CCl3OO·, ·OH was located at 380 nm, which is attributed to CCl3OO· and ·OH abstracting hydrogen from phenothiazine to generate a phenothiazine radical. The rate constants of the reactions between phenothiazine and CCl3OO·, ·OH were determined to be 1.1×109, 4.0×109 L·mol-1·s-1, respectively. These results provide a theoretical foundation for the further study of the antioxidant activity of phenothiazine.

Key words: Antioxidant, Phenothiazine, Trichloromethylperoxyl radical, Hydroxide radical, Pulse radiolysis

MSC2000: 

  • O644