Cu(II)在对甲苯磺酸铜＋DMSO中的电还原

制备了对甲苯磺酸铜并首次用于电化学实验.差示扫描量热和热重曲线测定表明，对甲苯磺酸铜结晶容易脱除全部结晶水，无水盐在空气中不潮解.用循环伏安曲线、计时电流曲线和恒电流电解后的电位-时间曲线研究Cu(Ⅱ)在二甲基亚砜(DMSO)溶液中的电还原.结果表明, Cu(II)电还原为Cu的反应分两步进行，其中第一步是可逆过程.测定了Cu(II)在DMSO溶液中的扩散系数.

Electoreduction of Cu(II) in Cu(p- CH3C6H4SO3)2+ DMSO

Copper p-toluenesulfonate was synthesized and has been applied to the electrochemical test for the first time. This salt can lose all its hydrated water easily and the dehydrated salt does not deliquesce in air. Hence, the copper p-toluenesulfonate is suitable to the electrochemical studies in organic solvents. The cyclic voltammetry, chronoamperometry and potential-time curve after galvanostatic electrolysis were used to study the electro-reduction of Cu(II) on Pt electrode in Cu (p-CH3C6H4SO3)2＋TBAP＋DMSO. The electro-reduction of Cu (II) to Cu proceeds by two steps: Cu (II)＋e = Cu (I), Cu (I)＋e = Cu. The first step is reversible. The diffusion coefficient of Cu(II) in DMSO is determined as 1.0×10－6 cm2?s－1 at 301 K.