Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuencho, Nakaku, Sakai, Osaka 599-8531, Japan.
Analyst. 2019 Nov 18;144(23):6858-6861. doi: 10.1039/c9an01769k.
A highly lipophilic ionic liquid (IL) consisting of stoichiometrically equal amounts of two purely functional chemical sensing molecules, an anionic calcium ionophore and a cationic dye, was synthesized for the first time, and used as a component for a poly(vinyl chloride)-based or neat liquid membrane optical sensor. This is the first report of an IL consisting of purely functional chemical sensing molecules, which is completely different from the previously reported ionic liquids typically consisting of imidazolium or other lipophilic cations. Since the present IL contained an extremely high concentration of dyes, the IL-based sensor showed dramatically enhanced sensitivity (13 times higher compared to that of a conventional sensor), and fully reversible and selective response to Ca2+. Preliminary investigation on the unique response characteristics of the present liquid membrane IL-based sensor was performed with the responses to Ca2+ and Na+.
首次合成了一种由化学计量比相等的两种纯功能化学传感分子（阴离子钙离子载体和阳离子染料）组成的高亲脂性离子液体（IL），并将其用作基于聚氯乙烯的或纯液膜光学传感器的组成部分。这是首次报道由纯功能化学传感分子组成的 IL，与以前报道的通常由咪唑鎓或其他亲脂性阳离子组成的离子液体完全不同。由于本 IL 中含有极高浓度的染料，因此基于 IL 的传感器表现出显著增强的灵敏度（比常规传感器高 13 倍），并对 Ca2+ 具有完全可逆和选择性的响应。对基于 present 液膜 IL 的传感器的独特响应特性进行了初步研究，包括对 Ca2+和 Na+的响应。
