In situ generation and detection of methyl radical by voltammetry  

作　　者：SONG Junfeng CHEN Zhaopeng GUO Wei WANG Fumin 

机构地区：[1]Institute of Analytical Science, Northwest University,Institute of Analytical Science, Northwest University,Department of Chemistry, Northwest University,Department of Chemistry, Weinan Normal College Xi'an 710069, China,Xi'an 710069, China,Xi'an 710069, China,Weinan 714000, China

出　　处：《Chinese Science Bulletin》2003年第11期1093-1096,共4页

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.29875017);the Natural Science Foundation of Shaanxi Province(Grant No.2002B01).

摘　　要：In persulfate-acetate, dimethyl sulfoxide or tert-butyl alcohol systems, in situ generation and detection of methyl free radical are realized with voltammetry. It includes the following successive processes. The persulfate S2O82 is polarographically reduced via one-electron addition to sulfate radical SO4, the SO4 initiates chain reaction with acetate, dimethyl sulfoxide, or tert-butyl alcohol on the electrode surface to produce a methyl radical, and one-electron reduction of the methyl radical yields its polarographic reduction wave. In comparison with the known techniques such as ultraviolet radiolysis coupling with electron spin resonance, etc., the proposed method is simple, sensitive and selective.In persulfate-acetate, dimethyl sulfoxide or tert-butyl alcohol systems, in situ generation and detection of methyl free radical are realized with voltammetry. It includes the following successive processes. The persulfate S2O82 is polarographically reduced via one-electron addition to sulfate radical SO4, the SO4 initiates chain reaction with acetate, dimethyl sulfoxide, or tert-butyl alcohol on the electrode surface to produce a methyl radical, and one-electron reduction of the methyl radical yields its polarographic reduction wave. In comparison with the known techniques such as ultraviolet radiolysis coupling with electron spin resonance, etc., the proposed method is simple, sensitive and selective.

关 键 词：伏安法 二甲基亚砜 醋酸盐 甲基自由基 辐射分解 SO4^ˉ 硫酸根离子 

分 类 号：O657.1[理学—分析化学]