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采用金网橱光透薄层电解池,配合紫外可见光谱技术现场监测了有机染料紫脲酸铵的电还原过程。用光透薄层光谱电化学方法测定了紫脲酸铵在pH5.0醋酸盐缓冲溶液中的式电极电位和电子转移数。薄层循环伏安法和薄层光谱电化学法研究表明,紫脲酸铵在金网栅电极上的还原为双电子转移不可逆过程,pH<8时,还原产物双巴比士亚胺进一步分解为尿咪和巴比士酸。用双电位跃-计时吸收谱法研究了双巴比士亚胺在不同pH缓冲溶液中的分解动力学过程,测定了拟-级反应动力学常数。
Using a gold net cabinet light through the thin electrolytic cell, with UV-Vis spectroscopy on-site monitoring of organic dye ammonium urea discharge process. The electrode potential and electron transfer number of ammonium urethane in acetate buffer solution pH5.0 were determined by light-permeable thin-layer spectroelectrochemical method. The results of thin-layer cyclic voltammetry and thin-film spectroscopy showed that the reduction of ammonium urethane on the gold grid electrode was an irreversible two-electron transfer process. When the pH value was less than 8, the dibasic product of the reduction product was further decomposed For urine and barbie acid. The dissociation kinetics of double-dipyridamole in different pH buffer solutions was investigated by bipotentiometric-time-resolved absorption spectroscopy. The kinetic constants of the pseudo-first order reaction were determined.