自组装膜修饰电极上Cu-BTC的直接电子转移  

Direct Electron Transfer of Copper-Benzene-1,3,5-Tricarboxylate on Gold Electrode Surface Modified with 3-Mercaptopropionic Acid Self-assembled Monolayer

作　　者：房晓彤 郑青 黄曦明 邵会波 FANG Xiao-Tong;ZHENG Qing;HUANG Xi-Ming;SHAO Hui-Bo(School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 102488,China)

机构地区：[1]北京理工大学化学与化工学院

出　　处：《分析化学》2019年第8期1180-1187,共8页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.21872006);国家重点研发计划项目(No.2017YFB1104300)资助~~

摘　　要：利用3-巯基丙酸(MPA)自组装膜末端羧基与铜基金属有机骨架材料(MOFs)1,3,5-均苯三甲酸合铜(Cu-BTC)的开放配位点进行配位键合,将Cu-BTC固定在MPA自组装膜上,制备了Cu-BTC修饰电极,实现了Cu-BTC的直接电子转移。采用红外光谱、扫描电子显微镜和X射线粉末衍射等方法对制备的自组装膜修饰电极以及合成的Cu-BTC进行了表征。采用循环伏安法和交流阻抗法研究了Cu-BTC的直接电子转移行为,结果表明,短链MPA自组装膜与Cu-BTC配位键合,有利于Cu-BTC的直接电子转移,氧化和还原可逆性更好。自组装膜配位键合固定MOFs的方法为研究Cu-BTC的直接电子转移过程提供了新思路。The Cu metal organic framework (MOFs) material, copper-benzene-1,3,5-tricarboxylate ( Cu-BTC ) modified electrode was constructed by anchoring Cu-BTC on the surface of gold electrode (Au) with the aid of 3-mercaptopropionic acid (MPA) self-assembled monolayer (SAM) ( Cu-BTC /MPA/Au). The direct electrochemistry of Cu-BTC was realized on the above-mentioned electrode. Fourier transform infrared spectroscopy, scanning electron spectroscopy (SEM) and powder X-ray diffraction (XRD) were used to characterize the MPA SAM and Cu-BTC . Also, SEM and energy dispersive X-ray spectrometry (EDS) were used to characterize Cu-BTC /MPA/Au. The electrochemical properties of Cu-BTC /MPA/Au were characterized by cyclic voltammetry and electrochemical impedance spectroscopy (EIS), and it was found that the electrode had a relatively higher electron transport rate. The results also showed that a short SAM, the MPA SAM, resulted in the faster direct electron transfer of Cu-BTC . The method of anchoring MOFs with self-assembled membrane provided a new insight into the direct electron-transfer process of the Cu-BTC .

关 键 词：1 3 5-均苯三甲酸合铜 金属有机骨架材料 直接电子转移 自组装膜 

分 类 号：O64[理学—物理化学]