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Self-Supporting, Hydrophobic, Ionic Liquid-Based Reference Electrodes Prepared by Polymerization-Induced Microphase Separation
ACS Sensors ( IF 8.9 ) Pub Date : 2017-09-25 00:00:00 , DOI: 10.1021/acssensors.7b00512
Sujay A. Chopade 1 , Evan L. Anderson 1 , Peter W. Schmidt 1 , Timothy P. Lodge 1 , Marc A. Hillmyer 1 , Philippe Bühlmann 1
Affiliation  

Interfaces of ionic liquids and aqueous solutions exhibit stable electrical potentials over a wide range of aqueous electrolyte concentrations. This makes ionic liquids suitable as bridge materials that separate in electroanalytical measurements the reference electrode from samples with low and/or unknown ionic strengths. However, methods for the preparation of ionic liquid-based reference electrodes have not been explored widely. We have designed a convenient and reliable synthesis of ionic liquid-based reference electrodes by polymerization-induced microphase separation. This technique allows for a facile, single-pot synthesis of ready-to-use reference electrodes that incorporate ion conducting nanochannels filled with either 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide or 1-dodecyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide as ionic liquid, supported by a mechanically robust cross-linked polystyrene phase. This synthesis procedure allows for the straightforward design of various reference electrode geometries. These reference electrodes exhibit a low resistance as well as good reference potential stability and reproducibility when immersed into aqueous solutions varying from deionized, purified water to 100 mM KCl, while requiring no correction for liquid junction potentials.

中文翻译:

通过聚合诱导的微相分离制备的自支撑疏水离子液体基参比电极

离子液体和水溶液的界面在各种电解质水溶液浓度范围内均表现出稳定的电势。这使得离子液体适合作为桥接材料,在电分析测量中将参比电极与离子强度低和/或未知的样品分开。但是,尚未广泛探索制备基于离子液体的参比电极的方法。我们设计了一种通过聚合诱导的微相分离方便,可靠地合成基于离子液体的参比电极的方法。这项技术可以轻松实现,即用型参比电极的单锅合成,其中包含填充有1-辛基-3-甲基咪唑双(三氟甲基磺酰基)酰亚胺或1-十二烷基-3-甲基咪唑双(三氟甲基磺酰基)酰亚胺的离子导电纳米通道,机械牢固的交联聚苯乙烯相支撑。该合成过程允许直接设计各种参比电极几何形状。当浸入从去离子,纯净水到100 mM KCl的水溶液中时,这些参比电极表现出低电阻以及良好的参比电位稳定性和可重复性,而无需校正液体结电位。该合成过程允许直接设计各种参比电极几何形状。当浸入从去离子,纯净水到100 mM KCl的水溶液中时,这些参比电极表现出低电阻以及良好的参比电位稳定性和可重复性,而无需校正液体结电位。该合成过程允许直接设计各种参比电极几何形状。当浸入从去离子,纯净水到100 mM KCl的水溶液中时,这些参比电极表现出低电阻以及良好的参比电位稳定性和可重复性,而无需校正液体结电位。
更新日期:2017-09-25
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