Abstract:

The electro-oxidation of 2-methylpyridine(2-picoline) was investigated at a PbO₂ electrode in the presence of sodium dodecylbenzenesulfonate(SDBS) in water/acetone solvents by cyclic voltammetry and controlled-potential coulometry.It was found that the selectivity and the current efficiency of the electro-oxidation from 2-picoline to 2-pyridinecarboxylic acid were obviously higher than that in aqueous and water/acetone mixed solvents when SDBS was added in acetone /water mixed solvents.The results indicate that under the optimal conditions, the reaction can obtain a selectivity of 81.98% and a current efficiency of 59.32%.The present method provides a simple method for electro-oxidation of 2-methylpyridine.

摘要：

通过恒电位电解实验，在以质子交换膜为隔膜的电解槽内，将十二烷基苯磺酸钠 (SDBS)添加于2-甲基吡啶电氧化的有机合成体系中，研究了2-甲基吡啶在PbO₂电极上的电氧化行为。通过实验确定最佳条件为：2-甲基吡啶浓度为0.5 mol·L^-1,H2SO4浓度为1.0 mol·L^-1,丙酮/水（3∶1）为溶剂，阳极电位为