A highly selective colorimetric sensor for Hg2+ based on a copper (II) complex of thiosemicarbazone in aqueous solutions |
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| Authors: | TaiBao Wei JunJian Li CuiBing Bai Qi Lin Hong Yao YongQiang Xie YouMing Zhang |
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| Institution: | 14863. Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China; Key Laboratory of Polymer Materials of Gansu Province; College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
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| Abstract: | By applying an indirect strategy, a new copper (II) complex of a thiosemicarbazone L has been successfully developed as a colorimetric chemosensor for the sensitive detection of mercury (II) ions. In the presence of copper (II) ions, the colorless solution of L became yellow; however, upon the addition of traces of mercury (II) ions, the yellow color faded to colorless immediately. Other ions, including Fe3+, Ag+, Ca2+, Zn2+, Pb2+, Cd2+, Ni2+, Co2+, Cr3+ and Mg2+ had a negligible influence on the probe behavior. The detection limits were 5.0×10?6 M and 3.0×10?7 M of Hg2+ using the visual color changes and UV-vis changes respectively. Test strips based on Cu-L were fabricated, which could act as a convenient and efficient Hg2+ test kits. |
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