Electrosynthesis of poly( o-phenylenediamine) in ionic liquid and its properties  

作　　者：DU YanFang WANG Huan ZHANG AiJian LU JiaXingt 

机构地区：[1]Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University,Shanghai 200062, China

出　　处：《Chinese Science Bulletin》2007年第16期2174-2178,共5页

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 20573037);the Natural Science Foundation of Shanghai (Grant No. 05JC14070)

摘　　要：Ionic liquid 1-ethyl-3-methylimidazolium bromide (EMIMBr) and N-methylimidazolium tetrafluorobo-rate (HMIMBF4) have been used as solvent and electrolyte for the electropolymerization of o-phenylenediamine at glassy carbon electrode by cyclic voltammetry. It was found that monomer was more easily oxidized in ionic liquid than acidic aqueous solution,and oxidative potential was reduced by 0.725 and 0.455 V,respectively. Electrode modified with poly(o-phenylenediamine) (PPD) has obvi-ous electrochemical activity in acid solution (pH 1-4). The apparent diffusion coefficient (Dapp) of PPD film is measured by chronocoulometry and chronoamperometry. The polymer structure is measured by UV and IR. IR spectrometry reveals that poly(o-phenylenediamine) has phenazine ring structure. The heat stability of polymer is observed from thermogravimetry.Ionic liquid l-ethyl-3-methylimidazolium bromide （[EMIM]Br） and N-methylimidazolium tetrafluoroborate （[HMIM]BF4） have been used as solvent and electrolyte for the electropolymerization of o-phenylenediamine at glassy carbon electrode by cyclic voltammetry. It was found that monomer was more easily oxidized in ionic liquid than acidic aqueous solution, and oxidative potential was reduced by 0.725 and 0.455 V, respectively. Electrode modified with poly（o-phenylenediamine） （PPD） has obvious electrochemical activity in acid solution （pH 1 --4）. The apparent diffusion coefficient （Dapp） of PPD film is measured by chronocoulometry and chronoamperometry. The polymer structure is measured by UV and IR. IR spectrometry reveals that poly（o-phenylenediamine） has phenazine ring structure. The heat stability of polymer is observed from thermogravimetry.

关 键 词：电聚合 离子液体 聚o-苯二胺 电气化学特性 

分 类 号：O632.63[理学—高分子化学]