A highly sensitive and selective chemosensor for Pb2+ based on quinoline–coumarin |
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| Authors: | Xianjiao Meng Duanlin Cao Zhiyong Hu Xinghua Han Zhichun Li Wenbing Ma |
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| Affiliation: | School of Chemical Engineering and Technology, North University of China, Taiyuan 030051 P. R. China.; National Demonstration Center for Experimental Comprehenisve Chemical Engineering Education, North University of China, Taiyuan 030051 P. R. China |
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| Abstract: | In this study, a highly sensitive and selective fluorescent chemosensor, ethyl(E)-2-((2-((2-(7-(diethylamino)-2-oxo-2H-chromene-3-carbonyl)hydrazono)methyl)quinolin-8-yl)oxy)acetate (1), was synthesized and characterized by 1H NMR, 13C NMR and ESI-MS. Sensor 1 showed an “on–off” fluorescence response to Pb2+ with a 1 : 1 binding stoichiometry in CH3CN/HEPES buffer medium (9 : 1 v/v). The detection limit of sensor 1 to Pb2+ was determined to be 0.5 μM, and the stable pH range for Pb2+ detection was from 4 to 8.A highly sensitive and selective fluorescent chemosensor 1 was synthesized and used for naked eye detection of Pb2+. |
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