【摘要】 对氯苯乙酸在生活生产中有重要应用，到目前为止，大多数合成方法都有烦琐的步骤或使用各种重金属催化剂，成本高且有污染.笔者提出一种在CO₂存在下，电化学还原4-氯氯苄制备高价值对氯苯乙酸化合物的方法，同时实现温室气体CO₂的利用与转化.采用4-氯氯苄在含电解质四乙基四氟硼酸铵的乙腈溶剂中恒电位电解合成对氯苯乙酸，电解产物经过核磁、质谱等表征方式确认结构.结果表明，法拉第电解效率为94.0%,转化率为92.9%.利用循环伏安法和原位FT-IR光谱电化学相结合的方法，探究了电化学还原制备对氯苯乙酸的电子转移机制.发现银电极上，CO₂气氛下4-氯氯苄的还原过程机制为两电子的不可逆过程，生成的一价阴离子随后进攻CO₂生成对氯苯乙酸.更多还原

【Abstract】 Phenylacetic acid derivatives such as 4-chlorophenylacetic acid have important applications in domestic production, so far, most synthesis methods have cumbersome steps or use a variety of heavy metal catalysts with high cost and pollution. In this paper, a method of electrochemical reduction of 4-chlorobenzyl chloride to produce high value 4-chlorophenylacetic acid compounds in the presence of CO₂ was proposed, and the utilization and conversion of greenhouse gas CO₂ was realized at the same time. 4-Chlorophenylacetic acid was synthesized by potentiostatic electrolysis with 4-chlorobenzyl chloride in acetonitrile solvent containing tetraethyl ammonium tetrafluoroborate. The structure of the electrolytic product was confirmed by NMR and mass spectrometry. The results showed that the electrolysis efficiency of Faraday was 94.0% and the conversion rate was 92.9%. The electron transfer mechanism of 4-chlorophenylacetic acid by electrochemical reduction was investigated by cyclic voltammetry and in-situ FT-IR spectroelectrochemistry. It was found that the reduction process of 4-chlorophenyl chloride on silver electrode under CO₂ atmosphere was an irreversible process of two electrons, which produced a monovalent anion, and then attacked CO₂ to produce 4-chlorophenylacetic acid.更多还原