现场压电红外反射光谱电化学研究邻联甲苯胺的电化学行为

利用现场压电红外发射光谱电化学技术研究邻联甲苯胺(OTD)在金电极上的电化学行为.压电电化学结果表明:电位范围对OTD氧化的影响很大.当电位扫至0.6 V时,氧化过程中中间体的生成和溶解的同时,部分未溶中间体在电极表面沉积.当电位大于0.65 V时,还有OTD的电化学氧化聚合.压电红外反射光谱电化学结果表明中间体是OTD第一氧化产物之间相互作用形成的.进一步考察了肝素大阴离子对OTD的氧化的影响.

In Situ Piezoelectric Infrared Spectroelectrochemistry for Study of Electrochemical Oxidation of o-Tolidine

In situ piezoelectric infrared spectroelectrochemistry was used to study the electrochemical behavior of o-tolidine(OTD) on the gold electrode.The piezoelectric and electrochemistry results showed that the oxidation of o-tolidine in BR buffer solution was greatly affected by potential.In the range of 0-0.4 V,the intermediate compound was formed and dissolved during the potential scanning.While the potential was scanned up to 0.6 V the media compound was found to be formed and dissolved,and some of them deposited on the electrode surface at the same time.When the potential was expanded to 0-0.75 V,the intermediate compound formed,dissolved and deposited and the polymerization of OTD was found.The in situ piezoelectric infrared spectroelectrochemistry showed that the intermediate compound was formed between the first oxidation products of o-tolidine.The effect of the large ion such as heparin on the oxidation of OTD was also investigated.