Mao Hui, Zhang Haifeng, Liang Jiachen, Liu Daliang, Wu Shuyao, Zhang Yu, Zhang Yuyang, Wu Qiuhua, Zhang Guolin, Song Xi-Ming
Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, Liaoning University, Shenyang 110036, China.
J Mater Chem B. 2015 Jul 14;3(26):5310-5317. doi: 10.1039/c5tb00259a. Epub 2015 Jun 10.
Novel poly(ionic liquids) functionalized polypyrrole nanotubes (PILs/PPyNTs) were successfully synthesized. 1-Vinyl-3-ethylimidazole bromide (VEIB) was polymerized on the surface of novel polymerizable vinyl imidazolium-type IL modified PPyNTs prepared by a covalent method. Due to the modification of PILs, the dispersibility of PILs/PPyNTs in aqueous solution was significantly improved and their surface charge properties were obviously changed to electropositivity. Because of the synergetic effects of conductive PPyNTs and biocompatible PILs, excellent electrochemical catalytic activities towards dopamine (DA) and ascorbic acid (AA) were achieved using a PILs/PPyNTs modified glassy carbon electrode (GCE), which gave a large potential difference enough to well distinguish DA from AA, with excellent sensitivity and good stability, for the simultaneous detection of DA and AA. The existence of PILs effectively improved the transmission mode of electrons of DA and AA oxidation on the electrode and resulted in their different electrocatalytic performance.
成功合成了新型聚离子液体功能化聚吡咯纳米管（PILs/PPyNTs）。通过共价法制备的新型可聚合乙烯基咪唑型离子液体修饰的聚吡咯纳米管表面聚合了1-乙烯基-3-乙基咪唑溴化物（VEIB）。由于聚离子液体的修饰，PILs/PPyNTs在水溶液中的分散性显著提高，其表面电荷性质明显变为正电性。由于导电聚吡咯纳米管和生物相容性聚离子液体的协同作用，使用PILs/PPyNTs修饰玻碳电极（GCE）对多巴胺（DA）和抗坏血酸（AA）具有优异的电化学催化活性，该电极具有足够大的电位差以很好地区分DA和AA，具有优异的灵敏度和良好的稳定性，可同时检测DA和AA。聚离子液体的存在有效地改善了电极上DA和AA氧化的电子传输方式，并导致它们不同的电催化性能。
