薄层光谱电化学法邻联甲苯胺电子转移反应的热力学研究

Thin-Layer Spectroelectrochemistry Study on the Thermodynamics of Electron Transfer Reaction of o-Tolidine

本文使用自制的高质量铟锡氧化物(ITO)膜薄层光透电极以薄层光谱电化学法测定了邻联甲苯胺在高氯酸-乙酸介质的电极氧化过程电子转移数n和克式量电势E^(o′),研究了E^(o′)与温度的依赖关系,测定了其电极反应的热力学参数,给出△H^o=-7.68×l0~4J/mol,△S^o=-4.4e.u.,并指出该电极反应为一吸热反应。

The fcrmal oxidation potential and electron stoichiometries of o-tolidine redox couples under five temperatures have been determinded by using controlled potential-visible spectra method with high quality ITO film optically transparent electrode made by the authors. The dependence of the formal oxidation potential on temperature has been studied, giving ΔH^o value of -7. 68×10~4J/mol and ΔS^o value of -4. 40. u.. It was shown that the clctron transfer reacticn is an endothermic reaction.