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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Calix[4]arene Derivatives: Efficient Ionophores for Silver(I) Ion Sensors
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Calix[4]arene Derivatives: Efficient Ionophores for Silver(I) Ion Sensors

机译：杯[4]芳烃衍生物：银（I）离子传感器的高效离子载体

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摘要

Calix[4]arene derivatives with four imine units at the upper rim and different spacers between two calixarenes were employed as highly promising lipophilic neutral carriers to prepare a series of silver-selective electrodes.These calix[4]-arenes possess a flexible conformation for rapid ion-exchange across the PVC membrane to provide good response for silver ions.The prepared silver ion-selective electrodes exhibited near-Nernstian responses for silver ions over a wide concentration range of 1.0X10~(-1)-1.0X10~(-5) M with a very low detection limit of approx10~(-6) M.The potentiometric responses were independent of the pH of the test solution over wide acidic pH range.The effect of various plasticizers on the electrode characteristics was also examined,and bis(2-ethylhexyl) sebacate proved to be the most suitable,since it provided the best slope and other electrode characteristics.High selectivity for Ag~+ over Hg~(2+),Na~+,and many other cations was found.The high selectivity for silver ions is mainly attributed to host-guest interactions that occur between the silver and appended groups of calix[4]arene derivatives.The electrodes were used as indicator electrodes in potentiometric titration involving silver ion,and provided a simple method for the determination of Ag~+ and Cl~- in water samples.
机译：杯状[4]芳烃衍生物在上缘具有四个亚胺单元，并且两个杯芳烃之间具有不同的间隔基，被用作极有希望的亲脂性中性载体，以制备一系列银选择性电极。这些杯[4]芳烃具有灵活的构象制备的银离子选择电极在1.0X10〜（-1）-1.0X10〜（-）的宽浓度范围内对银离子表现出近能斯特响应。 5）M，检测极限很低，约为10〜（-6）M.在宽酸性pH范围内，电位响应与测试溶液的pH无关，还研究了各种增塑剂对电极特性的影响，并癸二酸二（2-乙基己基）酯由于提供了最佳的斜率和其他电极特性而被证明是最合适的。发现Ag〜+对Hg〜（2 +），Na〜+和许多其他阳离子具有高选择性。对银的高选择性er离子主要归因于银和杯芳烃[4]亚芳基衍生物的附加基团之间发生的主体-客体相互作用。电极用作涉及银离子的电位滴定中的指示电极，并提供了一种测定Ag的简单方法水中的〜+和Cl〜-。

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