聚苯偶酰的合成及在水系电解液中的循环伏安性能  

Synthesis of Polybenzil and Its Cyclic Voltammetric Performance in Aqueous Electrolyte

作　　者：张世豪 丁菡 黎明 Shihao Zhang;Han Ding;Ming Li(College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学化学化工学院,湖北武汉430062

出　　处：《高分子材料科学与工程》2022年第11期154-159,168,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21873027);湖北省自然科学基金资助项目(2020CFA091)。

摘　　要：发展新型电化学活性分子对各种电化学器件的开发具有重要意义。文中通过电化学工作站测试,发现苯偶酰小分子在乙醇和水的混合溶液中具有良好的循环伏安可逆性,并以对苯二甲醛为单体,利用安息香缩合串联氧化脱氢反应首次制备了聚苯偶酰高聚物(DB-YHH)。傅里叶变换红外光谱、核磁共振光谱及渗透凝胶色谱测试结果证明,DB-YHH是一类含有邻双羰基的共轭聚合物。该合成方法简单易行、原料简单易得、经济性高。电化学工作站测试结果表明,聚苯偶酰在1 mol/L的KOH水系电解液中具有良好的电化学可逆性,其还原电势为0.206 V vsRHE、氧化电势为0.082 V vsRHE、可逆电势差为124 mV。文中开辟了一种安息香缩合串联氧化脱氢反应制备聚苯偶酰的新方法,为新型聚苯偶酰类聚合物的制备提供了参考。此外,聚苯偶酰在水系电解液中良好的电化学活性有望在各类电化学电池中得到应用。Developing electrochemically active molecules is of great significance for expanding various electrochemical devices.Through the electrochemical workstation test,a small benzil molecule with good cyclic voltammetric reversibility within the electrochemical window of a mixed solution of ethanol and water was discovered.At the same time,based on simple benzoin condensation and oxidative dehydrogenation coupling reactions,a polybenzil polymer material(DB-YHH)was prepared.Fourier transform infrared spectroscopy,nuclear magnetic resonance spectroscopy and permeation gel chromatography test results prove that DB-YHH is a class of conjugated polymers containing ortho-biscarbonyl groups.The polybenzil is easy to be synthesized and the polymerization reaction is highly atom economic.The electrochemical workstation test results show that polybenzyl has a good electrochemical reversibility in 1 mol/L KOH aqueous electrolyte,with a reduction potential of 0.206 V vs RHE,an oxidation potential of 0.082 V vs RHE,and a reversible potential difference of 124 mV.This work opens up a new method for the preparation of polybenzil by benzoin condensation reaction followed by oxidative dehydrogenation,which may lead to the birth of a series of new polybenzil polymers.Moreover,the good electrochemical activity of polybenzil in water electrolyte may have potential applications in various types of electrochemical cell.

关 键 词：苯偶酰 聚苯偶酰 安息香缩合 氧化脱氢 循环伏安 

分 类 号：TM91[电气工程—电力电子与电力传动]