对磺酸基苯偶氮杯[4]芳烃电化学行为研究  

An Electrochemical Investigation of p-sulfophenylazo Calix[4]arene in a Buffer Solution

作　　者：杨星[1] 陈平[1] 

机构地区：[1]辽宁石油化工大学材料化学与材料科学学院,辽宁抚顺113001

出　　处：《电化学》2016年第1期37-42,共6页Journal of Electrochemistry

基　　金：教育部科学技术研究重点项目(No.209031)资助

摘　　要：以杯[4]芳烃和对氨基苯磺酸为原料,经重氮化-偶联反应合成了对磺酸基苯偶氮杯[4]芳烃,并使用紫外吸收光谱、红外吸收光谱、核磁共振等技术对其进行表征分析.首次以CH_3COOH-CH_3COONa为缓冲溶液,使用循环伏安法研究对磺酸基苯偶氮杯[4]芳烃的电化学行为.结果表明,当扫描电位在-0.5~1 V时,有1对氧化还原峰,其中氧化峰电位为0.302 V,还原峰电位为-0.003 V,且峰电流与峰电位均与扫描速率呈线性关系,推测该峰的形成受扩散控制影响,反应为动力学准一级可逆反应.进一步利用多种电化学手段研究该电极反应,并求得动力学参数,反应活化能为14.84 k J·mol^(-1).Thep-sulfophenylazo calix[4]arene was synthesized through the diazotization-coupling reaction between calix[4]arene and p-aminobenzene sulfonic acid. The UV-Vis spectroscopy, Infxared spectroscopy, and nuclear magnetic resonance （NMR） were used to characterize the as-prepared p-sulfophenylazo calix[4]arene. The electrochemical behaviors ofp-sulfophenylazo calix [4]arene were investigated by cyclic voltammetry and chronoamperometry using CH3COOH-CH3COONa as a buffer solution. The result shows that the p-sulfophenylazo calix[4]arene exhibited a pair ofredox peaks in a scan potential region of-0.5 - 1 V. The ox- idation and reduction peak potentials were 0.302 V and -0.003 V, respectively, and changed with the scanning rates. In addition, the electrode reaction was studied by various electrochemical methods, and the kinetic parameters have also been obtained. The activa- tion energy was found to be 14.84 kJ. mol-l.

关 键 词：芳烃 循环伏安法 玻碳电极 电化学行为 

分 类 号：O625.65[理学—有机化学] O646[理学—化学]