A highly selective colorimetric sensor for Hg^(2+) based on a copper (Ⅱ) complex of thiosemicarbazone in aqueous solutions  

作　　者：WEI TaiBao LI JunJian BAI CuiBing LIN Qi YAO Hong XIE YongQiang ZHANG YouMing 

机构地区：[1]Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China [2]Key Laboratory of Polymer Materials of Gansu Province [3]College of Chemistry and Chemical Engineering, Northwest Normal University

出　　处：《Science China Chemistry》2013年第7期923-927,共5页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (21262032, 21064006 and 21161018);the Natural Science Foundation of Gansu Province (1010RJZA018);the Program for Changjian Scholars and Innovative Research Team in University of Minisry of Education of China (IRT1177)

摘　　要：By applying an indirect strategy, a new copper （II） complex of a thiosemicarbazone L has been successfully developed as a colorimetric cbemosensor for the sensitive detection of mercury （II） ions. In the presence of copper （II） ions, the colorless so- lution of L became yellow; however, upon the addition of traces of mercury （II） ions, the yellow color faded to colorless im- mediately. 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.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.

关 键 词：copper complex colorimetric sensor mercury cation aqueous solutions 

分 类 号：O657.3[理学—分析化学]