期刊
TETRAHEDRON
卷 69, 期 48, 页码 10292-10298出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2013.10.024
关键词
Mercury ions; Desulfurization; Dimerization; Fluorescence turn on; Thiosemicarbazone; Acetate anion
资金
- National Natural Science Foundation of China [21064006, 21262032, 21161018]
- Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China [IRT1177]
- Natural Science Foundation of Gansu Province [1010RJZA018]
- Youth Foundation of Gansu Province [2011GS04735, NWNU-LKQN-11-32]
A simple Hg2+-selective chemodosimetric system based on thiosemicarbazone was investigated. The transformation of thiosemicarbazone into semicarbazone selectively exerted by Hg2+ ions and the dimerization of semicarbazone resulted in a pronounced OFF ON-type fluorescent signaling behavior. The coexistent metal ions, such as Fe3+, Ca2+, Cu2+, Co2+, Ni2+, Cd2+, Pb2+, Zn2+, Cr3+, Mg2+, Na+, K+, and Fe2+, had no obvious interference with the detection of Hg2+. In addition, S-12-Hg2+ plays a high sensitivity for basic anions to form an 'OFF-ON-OFF' type signaling behavior, with the Hg2+-induced emission spectra can be quenched. Moreover, test strips based on S-12 exhibited a good selectivity to Hg2+. We believe the test strips could act as a convenient and efficient Hg2+ test kit. (C) 2013 Elsevier Ltd. All rights reserved.
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