不同电位影响5-硝基吲哚电化学聚合的光谱分析  

Spectral Analysis of the Effect of Different Polymerization Potential on Electrosynthesized Poly(5-Nitroindole) Films

作　　者：周卫强[1] 徐景坤[2] 汪敬武[1] 蒲守智[2] 

机构地区：[1]南昌大学化学系,江西南昌330031 [2]江西科技师范学院江西省有机功能分子重点实验室,江西南昌330013

出　　处：《光谱学与光谱分析》2007年第6期1106-1109,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20564001)资助

摘　　要：三氟化硼乙醚+10%乙醚体系中,恒电位(1·23～2·23Vvs·SCE)条件下可以获得高质量聚膜(PNI),这是首次获得硝基取代高性能导电高分子膜材料。5-硝基吲哚(NI)的起始氧化电位为1·04Vvs·SCE。电流-时间曲线、FTIR和1H NMR结果均表明聚合电位对PNI膜质量有较大影响。低电位有利于NI的聚合,且有利于增加PNI膜的共轭链长;高电位会导致NI的副反应,从而降低PNI膜的质量。同时红外光谱和1H NMR研究表明,NI的电化学聚合是通过2,3位进行的。High quality poly （5-nitroindole） （PNI） films can be synthesized electrochemically by direct anodic oxidation of 5-nitroindole （NI） in boron trifluoride diethyl etherate （BFEE） at different polymerization potential in the range of 1.23-2.23 V （vs. SCE）. To the best of our knowledge, this is the first time that high quality polymer films of nitro group substituted conducting polymers were electrodeposited. The oxidation onset potential of NI was only 1.04 V vs. SCE in this medium. Chronoamperometric response of NI, FTIR and 1H NMR indicated that the polymerization potential had a great effect on the quality of PNI films. Lower potential is helpful for the electrochemical polymerization of NI and the extension of the conjugation length of PNI. On the other hand, a higher potential led to side reactions and poor polymer film quality. The structural characterization of PNI films by FTIR and ^1H NMR indicated that the electrochemical polymerization of NI occurred at C2 and C3 positions.

关 键 词：导电高分子 聚吲哚 电化学聚合 红外光谱 核磁共振波谱 

分 类 号：O657.3[理学—分析化学]