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

被引：29
作者：
Ma, Jingjin [1 ]
Sheng, Ruilong [1 ]
Wu, Jiasheng [1 ]
Liu, Weimin [1 ]
Zhang, Hongyan [1 ]
机构：
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 197卷
关键词：
Zn2+ recognition; Coumarin derivative; Red emission; Aqueous solution; ZINC; CHEMOSENSOR; EVENTS; SHIFT; PROBE; CU2+;
D O I：
10.1016/j.snb.2014.03.017
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A new sensor (LWZn) based on 7-diethylaminocoumarin Schiff base was synthesized to detect Zn2+ in the red emission region due to its extended pi-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+. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：364 / 369
页数：6
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