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首页> 外文期刊>RSC Advances >A single colorimetric sensor for multiple targets: the sequential detection of Co2+ and cyanide and the selective detection of Cu2+ in aqueous solution
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A single colorimetric sensor for multiple targets: the sequential detection of Co2+ and cyanide and the selective detection of Cu2+ in aqueous solution

机译：用于多个目标的单个比色传感器：水溶液中Co 2 + 和氰化物的顺序检测以及Cu 2 + 的选择性检测

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A new highly selective and multifunctional chemosensor 1 for the detection of Co2+, Cu2+ and CN?, based on 4-diethylaminosalicyl aldehyde and thiophene-2-carbohydrazide moieties, was designed and synthesized. 1 could simultaneously detect both Co2+ and Cu2+ by changing its color from colorless to yellow in aqueous solution. The binding modes of 1 to Co2+ and Cu2+ were determined to be a 2?:?1 complexation stoichiometry through job plot and ESI-mass spectrometry analysis. The detection limits (0.19 μM and 0.13 μM) of 1 for Co2+ and Cu2+ were lower than the DEP guideline (1.7 μM) of Co2+ and the WHO guideline (31.5 μM) of Cu2+ for drinking water. Importantly, 1 could detect and quantify Co2+ and Cu2+ in real water samples. Moreover, the resulting Co2+-2·1 complex sensed cyanide through naked-eye, showing recovery from Co2+-2·1 to 1. The sensing mechanisms of Cu2+ by 1 were explained by theoretical calculations.
机译：新型高选择性多功能化学传感器1，用于检测Co 2 + ，Cu 2 + 和CN <设计并合成了基于4-二乙基氨基水杨醛和噻吩-2-碳酰肼部分的small> ？ 。 1通过将水溶液中的Co 2 + 和Cu 2 + 的颜色从无色变为黄色，可以同时检测到解。 1与Co 2 + 和Cu 2 + 的结合模式确定为2？：？通过工作图和ESI质谱分析获得1种络合化学计量。 Co 2 + 和Cu 2 + 的1的检出限（0.19μM和0.13μM）较低比Co 2 + 的DEP准则（1.7μM）和Cu 2 + 的WHO准则（31.5μM）喝水。重要的是，1可以检测和量化真实水样中的Co 2 + 和Cu 2 + 。此外，所得的Co 2 + -2·1络合物通过肉眼感测到氰化物，显示出从Co 2 + < / small> -2·1到1。通过理论计算解释了Cu 2 + 的感应机理。

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