一种新型的 5-巯基三唑席夫碱作为一种选择性比色化学传感器用于 Cu2+。
A novel 5-mercapto triazole Schiff base as a selective chromogenic chemosensor for Cu2+.
机构信息
Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, PR China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1837-42. doi: 10.1016/j.saa.2011.05.068. Epub 2011 May 31.
A novel colorimetric cation sensor bearing phenol, thiol and HCN groups was designed and synthesized. In a DMSO/H2O (9:1, v/v) solution, the sensor exhibited highly selective recognition of Cu2+ among a range of metal ions tested. In the presence of Cu2+, solutions of the sensor underwent a dramatic color change from colorless to yellow, while the presence of other metal cations such as Zn2+, Pb2+, Cd2+, Ni2+, Co2+, Fe3+, Hg2+, Ag+ and Ca2+ had no effect on the color. The detection limit of the sensor toward Cu2+ is 8.0×10(-7) M and an association constant Ka of 4.3×10(5) M(-1) was measured. The sensing of Cu2+ by this sensor was found to be reversible, with the Cu2+-induced color being lost upon addition of EDTA.
一种新型显色阳离子传感器，含有酚、硫醇和 HCN 基团，被设计和合成。在 DMSO/H2O（9:1，v/v）溶液中，该传感器对测试的多种金属离子表现出对 Cu2+的高选择性识别。在 Cu2+存在下，传感器溶液从无色变为黄色，而其他金属阳离子如 Zn2+、Pb2+、Cd2+、Ni2+、Co2+、Fe3+、Hg2+、Ag+和 Ca2+对颜色没有影响。该传感器对 Cu2+的检测限为 8.0×10(-7) M，测定的结合常数 Ka 为 4.3×10(5) M(-1)。通过加入 EDTA 发现该传感器对 Cu2+的传感是可逆的，Cu2+诱导的颜色在加入 EDTA 后消失。
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