A new coumarin-derived fluorescent sensor with red-emission for Zn2+ in aqueous solution

A new sensor (LWZn) based on 7-diethylaminocoumarin Schiff base was synthesized to detect Zn2+ in the red emission region due to its extended π-conjugation structure and the strong electron-withdrawing capability of nitrile groups. Although LWZn alone has weak fluorescence, its fluorescence intensit...

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Bibliographic Details
Published inSensors and actuators. B, Chemical Vol. 197; pp. 364 - 369
Main Authors Ma, Jingjin, Sheng, Ruilong, Wu, Jiasheng, Liu, Weimin, Zhang, Hongyan
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2014
Subjects
Aqueous solution
Coumarin derivative
Red emission
Zn2+ recognition
Coumarin derivative
Red emission
Zn2+ recognition
Aqueous solution
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Summary:A new sensor (LWZn) based on 7-diethylaminocoumarin Schiff base was synthesized to detect Zn2+ in the red emission region due to its extended π-conjugation structure and the strong electron-withdrawing capability of nitrile groups. Although LWZn alone has weak fluorescence, its fluorescence intensity shows a 35-fold increase after combining with Zn2+ probably due to the inhibition of the conformational change in the excited state upon complexation with Zn2+. In addition, LWZn shows a good selectivity to Zn2+ over other metal cations, especially Cd2+, which often responds together with Zn2+.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2014.03.017