H-bond stabilization of a tautomeric coumarin-pyrazole-pyridine triad generates a PET driven, reversible and reusable fluorescent chemosensor for anion detection

被引：25

作者：

Alkis, Meltem ^{[1
]}

Pekyilmaz, Damla ^{[1
]}

Yalcin, Ergin ^{[1
]}

Aydiner, Burcu ^{[1
]}

Dede, Yavuz ^{[1
]}

Seferoglu, Zeynel ^{[1
]}

机构：

[1] Gazi Univ, Fac Sci, Dept Chem, Tekn Kullar, TR-06500 Ankara, Turkey

来源：

DYES AND PIGMENTS | 2017年 / 141卷

关键词：

Coumarin-pyrazolone-pyridine triad; Tautomerism; Anion detection; DFT calculations; PET; ESIPT; FLUORIDE ANION; ON FLUORESCENT; SENSOR; RECOGNITION; LUMINESCENT; SELECTIVITY; HIGHLIGHTS; RECEPTOR; HYBRID; PROBES;

D O I：

10.1016/j.dyepig.2017.03.011

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A coumarin based anion sensor utilizing pyrazole both as an electron donor and hydroxyl H-bond donor and pyridine as a tautomer stabilizer is reported. The chemosensor exhibits ON-OFF-ON states and is more sensitive to F- at the stoichiometric ratio of 1:1. The OFF state is due to PET and the role of pyrazole is two fold, both stabilization of the enol tautomer via H-bonding and hosting domain of electrons enabling PET. Moreover, the absorption and emission properties of chemosensor change drastically upon acidification. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：493 / 500

页数：8

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