A selective fluorogenic chemodosimeter for Hg based on the dimerization of desulfurized product |
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| Authors: | Peng Zhang BingBing Shi YouMing Zhang Qi Lin Hong Yao XingMei You TaiBao Wei |
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| Institution: | 1. Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, PR China;2. Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, PR China |
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| Abstract: | 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, S12–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 S12 exhibited a good selectivity to Hg2+. We believe the test strips could act as a convenient and efficient Hg2+ test kit. |
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| Keywords: | Mercury ions Desulfurization Dimerization Fluorescence turn on Thiosemicarbazone Acetate anion |
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