Simultaneous Detection of Cu2+ and Co2+ by a Water‐Soluble Carboxamide‐Based Colorimetric Chemosensor,ChemistrySelect

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Simultaneous Detection of Cu2+ and Co2+ by a Water‐Soluble Carboxamide‐Based Colorimetric Chemosensor
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-01-20 , DOI: 10.1002/slct.201904318
Chang Joo Rha ₁ , Hangyul Lee ₁ , Cheal Kim ₁

Affiliation

A novel carboxamide‐based colorimetric chemosensor ATA‐Msal ((E)‐3‐((2‐hydroxy‐3‐methoxybenzylidene)amino)thiophene‐2‐carboxamide) for detecting Cu²⁺ and Co²⁺ in aqueous solution was synthesized. Sensor ATA‐Msal could probe Cu²⁺ and Co²⁺ by color change from colorless to pale yellow. According to results of Job plot and ESI‐mass, the binding modes of ATA‐Msal to Cu²⁺ and Co²⁺ were determined to be a 1 : 1 ratio. The detection limits (0.14 μM and 0.88 μM) of ATA‐Msal for Cu²⁺ and Co²⁺ were much lower than WHO standard (31.5 μM for Cu²⁺) and US Environmental Protection Agency (EPA) standard (1.70 μM for Co²⁺). ATA‐Msal can be applicable to real samples and test strips, and F⁻ could be used to distinguish between ATA‐Msal ‐Cu²⁺ and ATA‐Msal ‐Co²⁺. The sensing process of Cu²⁺ and Co²⁺ by ATA‐Msal was demonstrated by UV‐vis titration, ESI‐mass, EPR, ¹H NMR titration, and DFT.

中文翻译：

水溶性羧酰胺基比色化学传感器同时检测Cu2 +和Co2 +

合成了一种新型的基于羧酰胺的比色化学传感器ATA-Msal（（E）-3-（（2-羟基-3-甲氧基亚苄基）氨基）噻吩-2-羧酰胺），用于检测水溶液中的Cu ²⁺和Co ²⁺。传感器ATA‐Msal可以通过从无色到浅黄色的颜色变化来探测Cu ²⁺和Co ²⁺。根据作业图和ESI-质谱的结果，将ATA-Msal与Cu ²⁺和Co ²⁺的结合模式确定为1：1比率。检出限ATA-MSAL的（0.14μM和0.88μM）对Cu ²⁺和Co ²⁺相比要低得多WHO标准（31.5μM对Cu ²⁺）和美国环境保护署（EPA）标准（1.70μM的合作²⁺）。ATA-MSAL可以适用于实际样品和测试条，和F ^-可以使用ATA-MSAL -Cu区分²⁺和ATA-MSAL -Co ²⁺。紫外可见滴定，ESI质量，EPR，¹ H NMR滴定和DFT证明了ATA-Msal对Cu ²⁺和Co ²⁺的感测过程。

更新日期：2020-01-21

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