A highly sensitive and selective chemosensor for Pb based on quinoline-coumarin

In this study, a highly sensitive and selective fluorescent chemosensor, ethyl( E )-2-((2-((2-(7-(diethylamino)-2-oxo-2 H -chromene-3-carbonyl)hydrazono)methyl)quinolin-8-yl)oxy)acetate ( 1 ), was synthesized and characterized by 1 H NMR, 13 C NMR and ESI-MS. Sensor 1 showed an "on-off" fl...

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Published in:RSC advances 2018-10, Vol.8 (59), p.33947-33951
Main Authors: Meng, Xianjiao, Cao, Duanlin, Hu, Zhiyong, Han, Xinghua, Li, Zhichun, Ma, Wenbing
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container_start_page 33947
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creator Meng, Xianjiao
Cao, Duanlin
Hu, Zhiyong
Han, Xinghua
Li, Zhichun
Ma, Wenbing
description In this study, a highly sensitive and selective fluorescent chemosensor, ethyl( E )-2-((2-((2-(7-(diethylamino)-2-oxo-2 H -chromene-3-carbonyl)hydrazono)methyl)quinolin-8-yl)oxy)acetate ( 1 ), was synthesized and characterized by 1 H NMR, 13 C NMR and ESI-MS. Sensor 1 showed an "on-off" fluorescence response to Pb 2+ with a 1 : 1 binding stoichiometry in CH 3 CN/HEPES buffer medium (9 : 1 v/v). The detection limit of sensor 1 to Pb 2+ was determined to be 0.5 μM, and the stable pH range for Pb 2+ detection was from 4 to 8. A highly sensitive and selective fluorescent chemosensor 1 was synthesized and used for naked eye detection of Pb 2+ .
doi_str_mv 10.1039/c8ra04935a
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title A highly sensitive and selective chemosensor for Pb based on quinoline-coumarin
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