Abstract A potassium ion (K+) selective chemical sensor based on self assembled monolayer of 4-aminobenzo-18-Crown-6 ether as selective ionophore has been developed. Host-guest complexation of potassium ions and ionophore was confirmed by conductance studies, UV–Vis and FTIR Spectroscopic measurements. The binding of potassium ion to the ionophore at sensor surface was monitored using a redox probe [Ru(NH3)6]3 +/[Ru(NH3)6]4 + as ‘reporter ion’ employing cyclic voltammetry and differential pulse voltammetry. The sensor is found to be responsive to 1 μM to 10 mM K+ and selective over Li+, NH4+ and large excess of Na+ in solution.

中文翻译：

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基于冠醚功能化自组装单层的钾选择性电化学传感器

摘要 以4-氨基苯并-18-Crown-6 醚自组装单层为选择性离子载体，开发了一种钾离子（K+）选择性化学传感器。钾离子和离子载体的主客体络合通过电导研究、UV-Vis 和 FTIR 光谱测量得到证实。使用氧化还原探针 [Ru(NH3)6]3+/[Ru(NH3)6]4+ 作为“报告离子”，使用循环伏安法和微分脉冲伏安法监测钾离子与传感器表面离子载体的结合。发现该传感器对 1 μM 至 10 mM K+ 有响应，并且对溶液中的 Li+、NH4+ 和大量过量的 Na+ 具有选择性。