3,5-二氯硝基苯在乙腈溶液中电化学还原机制研究  

Investigation on electrochemical reduction mechanism of 3,5-dichloronitrobenzene in acetonitrile solution

作　　者：刘岩 金葆康[1] LIU Yan;JIN Baokang(School of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学化学化工学院,安徽合肥230601

出　　处：《安徽大学学报（自然科学版）》2023年第6期72-80,共9页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(22076001)。

摘　　要：采用循环伏安法和原位FT-IR光谱电化学法研究3,5-二氯硝基苯(3,5-DCNB)在乙腈(AN)溶液中的电化学行为.研究发现,在N2存在条件下,3,5-DCNB在-0.4~-1.2 V扫描电位区间内发生可逆的一步单电子还原,引入CO_(2),3,5-DCNB电化学行为转变为完全不可逆的4电子转移过程.采用电解法进一步探索在CO_(2)存在下3,5-DCNB的电解产物,并通过X-ray和IR对电解产物进行表征.结果表明,在3,5-DCNB的电化学还原时引入CO_(2),可高效合成3,3′,5,5′-四氯偶氮苯,同时实现CO_(2)的固定与转化.利用红外光谱电化学循环伏吸法(CVA)和导数循环伏吸法(DCVA)等电化学技术探究了3,5-DCNB在CO_(2)存在条件下的电化学机制.The electrochemical behavior of 3,5-dichloronitrobenzene(3,5-DCNB)in acetonitrile(AN)solution was investigated by cyclic voltammetry and in-situ FT-IR spectroelectrochemical methods.It was found that under N_2 conditions,3,5-DCNB underwent a reversible one-step single-electron reduction in the potential scanning interval from-0.4 to-1.2 V.With the introduction of CO_(2),the electrochemical behavior of 3,5-DCNB changed to a completely irreversible 4-electron transfer process.The electrolysis product of 3,5-DCNB in the presence of CO_(2)was further explored by electrolysis and characterized by X-ray and IR.The results showed that introducing CO_(2)could effectively synthesize 3,3′,5,5′-tetrachloroazobenzene by electrochemical reduction of 3,5-DCNB,and simultaneously realize the immobilization and conversion of CO_(2).The results showed that the electrochemical reduction of 3,5-DCNB by introducing CO_(2)leads to the targeted synthesis of 3,3′,5,5′-tetrachloroazobenzene and the simultaneous immobilization and conversion of CO_(2).The electrochemical mechanism of 3,5-DCNB in the presence of CO_(2)was investigated using electrochemical cyclic voltabsorptometry(CVA)and derivative cyclic voltabsorptometry(DCVA)with infrared spectroscopy.

关 键 词：3 5-二氯硝基苯 芳香硝基化合物 CO_(2)捕获 现场红外光谱电化学 

分 类 号：O657[理学—分析化学]