A New Fluorescent "Turn-Off" Coumarin-Based Chemosensor: Synthesis, Structure and Cu-Selective Fluorescent Sensing in Water Samples

被引：23

作者：

Karaoglu, Kaan ^{[1
]}

Yilmaz, Fatih ^{[2
]}

Mentese, Emre ^{[2
]}

机构：

[1] Recep Tayyip Erdogan Univ, Vocat Sch Tech Studies, Dept Chem & Chem Proc Technol, Rize, Turkey

[2] Recep Tayyip Erdogan Univ, Fac Arts & Sci, Dept Chem, Rize, Turkey

来源：

JOURNAL OF FLUORESCENCE | 2017年 / 27卷 / 04期

关键词：

Fluorescence; Copper (II) sensor; Coumarin; ICT; COPPER; ALUMINUM; PROBES; SENSOR; DOTS;

D O I：

10.1007/s10895-017-2062-x

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We report the synthesis and characterization two coumarin-based fluorescence probes, N'-{[7-(diethylamino)-2-oxo-2H-chromen-3-yl]carbonyl}pyridine-3-carbohydrazide (3) and N'-benzoyl-7-(diethylamino)-2-oxo-2H-chromene-3-carbohydrazide (4), proposed as a novel fluorescent chemosensor. The two probes designed showed an instant turn-off fluorescence response to Cu2+ over other metal ions in ethanol-water mixture based on intramolecular charge transfer (ICT). It was found that pyridine-analogue coumarin is highly selective and sensitive sensor for Cu2+. The 3 sensor coordinates Cu2+ in 1:1 stoichiometry with a binding constant, K-a = 5.22 M-1 and the detection limit was calculated 1.97 x 10(-9) M.

引用

页码：1293 / 1298

页数：6

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