Multifunctional electropolymerizable carbazole-based ionic liquids
Multifunctional electropolymerizable carbazole-based ionic liquids
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DOI：
10.1039/c5ra23896j
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发表时间：
2016-02
期刊：
影响因子：
3.9
通讯作者：
R. Kirankumar;T. Tsuda;Chih-Yao Chen;Chi-Yu Lu;S. Kuwabata;Po-Yu Chen
中科院分区：
文献类型：
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作者：
R. Kirankumar;T. Tsuda;Chih-Yao Chen;Chi-Yu Lu;S. Kuwabata;Po-Yu Chen
合成了可电聚合的咔唑官能化咪唑鎓和吡啶鎓基离子液体 (IL)，并使用 1H、13C、19F NMR 和 ESI-MS 进行了表征。它们通过循环伏安聚合在几种选定的室温离子液体 (RTIL) 以及常规有机溶剂中电聚合到氧化铟锡 (ITO) 电极上。在循环伏安聚合过程中观察到两个氧化还原电对，分别对应于咔唑官能化离子液体的单体和聚合物。研究发现，与常见的离子液体一样，阴离子成分对咔唑功能化离子液体的理化性质具有至关重要的影响。其阴离子被溶解有单体的电解质的阴离子取代。用于电聚合的RTIL因此决定了单体的电化学行为、聚(IL)膜的表面形貌和物理化学性质。用聚(ILs)修饰ITO电极后，半导体电极的尿酸氧化电化学性能显着提高。聚（离子液体）表现出可调节的特性（通过抗衡阴离子），并在有机溶剂中表现出广泛的溶解度，以及电致变色和溶剂化变色特性。
Electropolymerizable carbazole-functionalized imidazolium and pyridinium-based ionic liquids (ILs) were synthesized and characterized using 1H, 13C, 19F NMR, and ESI-MS. They were electropolymerized onto indium tinoxide (ITO) electrodes via cyclic voltammetric polymerization in several selected room temperature ILs (RTILs) as well as in conventional organic solvents. Two redox couples, corresponding to the monomer and polymer, respectively, of the carbazole-functionalized ILs, were observed during the cyclic voltammetric polymerization. It was found, as common ILs, that the anionic components exhibit crucial effects on the physicochemical properties of the carbazole-functionalized ILs. The anions of which were replaced by the anions of the electrolytes in which the monomers were dissolved. The RTILs used for the electropolymerization thus determined the electrochemical behavior of the monomers, the surface morphologies and the physicochemical properties of the poly(ILs) films. After the modification of ITO electrodes with poly(ILs), the electrochemical performance of the semiconducting electrodes was significantly improved towards uric acid oxidation. The poly(ILs) show adjustable properties (via counter anions), and exhibit a wide range of solubility in organic solvents, and electrochromic and solvatochromic properties.