Journal
SCIENCE CHINA-CHEMISTRY
Volume 56, Issue 7, Pages 923-927Publisher
SCIENCE PRESS
DOI: 10.1007/s11426-013-4863-3
Keywords
copper complex; colorimetric sensor; mercury cation; aqueous solutions
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Funding
- National Natural Science Foundation of China [21262032, 21064006, 21161018]
- Natural Science Foundation of Gansu Province [1010RJZA018]
- Program for Changjian Scholars and Innovative Research Team in University of Minisry of Education of China [IRT1177]
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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 5.0x10(-6) M and 3.0x10(-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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