A reversible fluorescent-colorimetric Schiff base sensor for Hg2+ ion

被引：23
|
作者：
Jimenez-Sanchez, Arturo [1 ]
Farfan, Norberto [2 ]
Santillan, Rosa [1 ]
机构：
[1] Inst Politecn Nacl, Dept Quim, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, Mexico
[2] Univ Nacl Autonoma Mexico, Dept Quim Organ, Fac Quim, Mexico City 04510, DF, Mexico
来源：
TETRAHEDRON LETTERS | 2013年 / 54卷 / 39期
关键词：
Fluorescent molecular sensor; Colorimetric; Schiff base; Phenylglycinol; EDTA; DESIGN; ACID;
D O I：
10.1016/j.tetlet.2013.07.072
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
A simple (R)-(-)-2-phenylglycinol functionalized Schiff base L1 and its characterization as a fluorescent-colorimetric sensor for Hg2+ ion are described. The UV-vis and fluorescence analysis in methanol and aqueous solution show complex formation between L1 and Hg2+ ion with a micromolar association constant. Competition experiments performed for the acetate salts of Hg2+, Zn2+, Co2+, Pb2+, Cd2+, Mn2+, Cu2+, Ni2+, and Ba2+ revealed that compound L1 exhibits high selectivity toward Hg2+ displaying a color change easily detectable by naked-eye and a turn-off fluorescent effect due to a chelation-enhanced quenching (CHEQ) mechanism. Moreover, addition of EDTA to L1-Hg2+ recovers the fluorescence and color offering receptor L1 as a reversible sensor for real-time applications. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5279 / 5283
页数：5
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