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一种新型基于香豆素的荧光“猝灭”化学传感器：合成、结构及对水样中铜离子的选择性荧光传感

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

作者信息

Karaoglu Kaan, Yilmaz Fatih, Menteşe Emre

机构信息

Vocational School of Technical Studies, Department of Chemistry and Chemical Processing Technology, Recep Tayyip Erdogan University, Rize, Turkey.

Faculty of Arts and Sciences, Department of Chemistry, Recep Tayyip Erdogan University, Rize, Turkey.

出版信息

J Fluoresc. 2017 Jul;27(4):1293-1298. doi: 10.1007/s10895-017-2062-x. Epub 2017 Mar 10.

DOI:10.1007/s10895-017-2062-x
PMID:28283898
Abstract

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 Cu 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 Cu. The 3 sensor coordinates Cu in 1:1 stoichiometry with a binding constant, K = 5.22 M and the detection limit was calculated 1.97 × 10 M.

摘要

我们报道了两种基于香豆素的荧光探针N'-{[7-(二乙氨基)-2-氧代-2H-色烯-3-基]羰基}吡啶-3-碳酰肼(3)和N'-苯甲酰基-7-(二乙氨基)-2-氧代-2H-色烯-3-碳酰肼(4)的合成与表征，它们被提议作为一种新型荧光化学传感器。所设计的这两种探针基于分子内电荷转移(ICT)，在乙醇-水混合物中对铜比对其他金属离子表现出即时的荧光猝灭响应。发现吡啶类似物香豆素是一种对铜具有高选择性和高灵敏度的传感器。3号传感器与铜以1:1的化学计量比配位，结合常数K = 5.22 M，检测限计算为1.97×10 M。

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