Experimental and Theoretical Studies for the Recognition of Multiple Anions (Cyanide and Sulfide) Based on a Thiazole-Derived Chemosensor
A new colorimetric chemosensor 1 (E)-2-(((4-(p-tolyl)thiazol-2-yl)imino)methyl)phenol for the detection of both CN– and S2– has been developed. The receptor 1 showed selective colorimetric responses to CN– and S2– in aqueous solution. A clear color change of 1 from pale yellow to colorless was observed with CN– through a nucleophilic addition mechanism, while S2– was detected through deprotonation mechanism with a distinct color change from pale yellow to deep yellow. The binding modes of receptor 1 with two analytes (CN– and S2– were proposed to be 1:1, based on Job plot, 1H NMR titration, ESI-mass spectrometry analysis, and theoretical calculations. Moreover, the receptor 1 could be used to quantify CN– in water samples. Furthermore, 1 could be used as practical, visible colorimetric test kits for S2– in an aqueous environment.
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Document Type: Research Article
Publication date: February 1, 2017
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