A colorimetric squaraine-based probe and test paper for rapid naked eyes detection of copper ion (II) |
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| Authors: | Yang Liu Liqiu Wang Chenxiao Guo Yajuan Hou |
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| Institution: | College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China |
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| Abstract: | A colorimetric probe N,N’-bis(2-methoxy-ethyl)-2,3,3-trimethyl-3H-squaraine (MOESQ) with H2O solubility was synthesized to detect Cu2+. MOESQ exhibits good selectivity, high sensitivity and fast UV-Vis response toward Cu2+ over other competing ions in CH3CN. The detection limit of MOESQ for Cu2+ in CH3CN can reach 1.88?×?10?7?molL?1. By adsorbing MOESQ on the chromatography paper, a colorimetric test paper for Cu2+ was prepared, which could detect Cu2+ with the color change from blue to faint yellow even in the limit of detection concentration of 10?6?molL?1. |
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| Keywords: | Squaraine Colorimetric sensor Copper ion Test paper Naked eye detection |
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