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首页> 外文期刊>Journal of the Brazilian Chemical Society >Ion recognition: synthesis of 2-methyl-2,4-di (2-thienyl)-2,3-dihydro-1H-1,5-benzodiazepine and its application in construction of a highly selective and sensitive Ag+ membrane sensors
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Ion recognition: synthesis of 2-methyl-2,4-di (2-thienyl)-2,3-dihydro-1H-1,5-benzodiazepine and its application in construction of a highly selective and sensitive Ag+ membrane sensors

机译：离子识别：2-甲基-2,4-二（2-噻吩基）-2,3-二氢-1H-1,5-苯并二氮杂卓的合成及其在构建高选择性和高灵敏度Ag +膜传感器中的应用

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摘要

A highly selective and sensitive plasticized membrane sensor for Ag+ ions based on 2-methyl-2,4-di(2-thienyl)-2,3-dihydro-1H-1,5-benzodiazepine (MTHB) as membrane carrier was prepared. The sensor shows a linear dynamic range of 1.0 × 10-6 -1.0 × 10-1 mol L-1, with a Nernstian slope of (58.5±0.3) mV decade-1, and a detection limit of 5.0 × 10-7 mol L-1 (~54 ppb). It has a fast response time of 10 s and can be used for at least eight weeks without any considerable divergences in its potentials. The proposed sensor revealed very good selectivities with respect to the most of common metal ions. The proposed sensor could be used in a pH range of 4.0-8.0. It was successfully used as an indicator electrode in potentiometric titration of Ag+ with NaCl.
机译：制备了以2-甲基-2,4-二（2-噻吩基）-2,3-二氢-1H-1,5-苯并二氮杂（MTHB）为膜载体的高选择性和灵敏的Ag +离子增塑膜传感器。该传感器的线性动态范围为1.0×10-6 -1.0×10-1 mol L-1，能斯特（Nernstian）斜率为（58.5±0.3）mV October-1，检测极限为5.0×10-7 mol L-1（〜54 ppb）。它具有10 s的快速响应时间，可以使用至少八周，而其电位没有任何明显的差异。提出的传感器对大多数常见金属离子具有很好的选择性。建议的传感器可以在4.0-8.0的pH范围内使用。它已成功用作NaCl电位滴定法测定Ag +的指示电极。

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