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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (11): 1063-1069. 上一篇    下一篇

研究论文

电化学共聚邻甲基苯胺和邻氨基苯甲酸的在线紫外-可见光谱的研究

张贵荣，赵淑凤，刘晓，刘秀丽，罗艳玲，陆嘉星   

  1. 华东师范大学化学系 上海市绿色化学与化学工程绿色化重点实验室 上海 200062
  • 投稿日期:2009-06-29 修回日期:2009-10-23 发布日期:2010-01-31
  • 通讯作者: 陆嘉星 E-mail:jxlu@chem.ecnu.edu.cn, lujx@chem.ecnu.edu.cn
  • 基金资助:

    国家自然科学基金

Study on Electrocopolymerization of o-Toluidine and Anthranilic Acid with in situ UV-vis Spectroscopy

ZHANG Gui-Rong, ZHAO Shu-Feng, LIU Xiao, LIU Xiu-Li, LUO Yan-Ling, LU Jia-Xing   

  1. Department of Chemistry, East China Normal University, Shanghai Key Laboratory of Green Chemistry and Chemical Process, Shanghai 200062
  • Received:2009-06-29 Revised:2009-10-23 Published:2010-01-31

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被引次数

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在0.5 mol/L H2SO4水溶液中, 以氧化铟锡(ITO)导电玻璃为工作电极, 用恒电位电解的方法, 在0.9 V电位下电化学共聚邻甲基苯胺(OT)和邻氨基苯甲酸(AA). 涉及的电化学聚合均用在线紫外-可见光谱进行跟踪, 结果表明电化学共聚随着反应体系中邻氨基苯甲酸的浓度的增加而变慢; 所得的均聚物和共聚物均用FTIR和扫描电镜表征. FTIR表明邻甲基苯胺和邻氨基苯甲酸之间发生了共聚; 扫描电镜图表明, 与聚邻甲基苯胺相比, 从200 mmol/L OT/50 mmol/L AA和150 mmol/L OT/50 mmol/L AA反应体系得到的共聚物具有小颗粒和较为致密的表面形貌; 这个现象也帮助证明了邻氨基苯甲酸应该与邻甲基苯胺发生了共聚, 并使表面形貌发生了改变.

关键词: 邻甲基苯胺, 邻氨基苯甲酸, 电化学共聚, 紫外-可见光谱, 傅立叶变换红外光谱, 扫描电镜

The copolymers of o-toluidine (OT) with anthranilic acid (AA) was electrochemically synthesized on indium tin oxide (ITO) conducting glass electrode by potentiostatic method at a potential of 0.9 V in sulfuric acid of 0.5 mol/L. The electropolymerizations in the present study was followed by in situ UV-vis spectrometry, which shows the rate of electropolymerization decreased as the concentration of anthranilic acid in reaction solution. The homo/copolymers deposited on ITO electrode was characterized using FTIR and scanning electron microscope (SEM). The FTIR spectra of homo/copolymers indicated that OT can be copolymerized with AA by potentiostatic electrolysis. The SEM images of the copolymers from 200 mmol/L OT/50 mmol/L AA and 150 mmol/L OT/50 mmol/L exhibit that copolymers have a smaller granular compact morphology in comparison with poly(o-toluidine), which also indirectly shows that the electrocopolymerization of OT and AA should happen.

Key words: o-toluidine, anthranilic acid, electrocopolymerization, UV-Vis spectrometry, FT-IR, SEM