a simple and sensitive thiazole-based colorimetric chemosensor for detection of cn−, aco− and cu2+ ions

A thiazole-based chemosensor (tcs) for detection of important ions was synthesized in high yield through diazotization–coupling reactions. sensor tcs in aqueous solution of acetonitrile displays notable colorimetric changes after addition of cn−, aco− and cu2+. on the basis of titration experiment and resultant good linear relationship between its absorbance and ions concentration, the lod of tcs for cn−, aco− and cu2+ sensing were found to be of micro-molar (μm) level, respectively. job’s plots revealed that the tcs interacts with corresponding ions using a 1:1 binding stoichiometry. furthermore, the test papers of the tcs were successfully prepared and applied to detect related ions in aqueous solution. this shows the potential application of the developed sensor for the detection of ions in the chemical and biological samples without any spectroscopic instrumentation. importantly, sensor tcs was used to retrieve cn− in real water samples with the least relative error.