A simple, reversible, colorimetric and water-soluble fluorescent chemosensor for the naked-eye detection of Cu2+ in ∼100% aqueous media and application to real samples

被引：59

作者：

Sun, Tao ^{[1
]}

Niu, Qingfen ^{[1
]}

Li, Tianduo ^{[1
]}

Guo, Zongrang ^{[1
]}

Liu, Haixia ^{[1
]}

机构：

[1] Qilu Univ Technol, Sch Chem & Pharmaceut Engn, Shandong Prov Key Lab Fine Chem, Jinan 250353, Shandong, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2018年 / 188卷

基金：

中国国家自然科学基金;

关键词：

Colorimetric; Water-soluble fluorescent chemosensor; Reversibility; Naked-eye detection; Cu2+; Chelation-enhanced fluorescence quenching; SELECTIVE FLUORESCENT; SEQUENTIAL DETECTION; SENSOR; PROBE; COPPER(II); AL3+; ION; HG2+; RECOGNITION; CU(II);

D O I：

10.1016/j.saa.2017.07.038

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A simple, reversible, colorimetric and water-soluble fluorescent chemosensor ADA for the naked-eye detection of Cu2+ was developed. Sensor ADA showed high selectivity and sensitivity toward Cu2+ in similar to 100% aqueous media over wide pH range. Sensor ADA exhibited a red-shift in the absorption spectra from 466 to 480 nm that is accompanied by significant color change from light yellow to yellowish brown instantaneously. The Cu2+ recognition is based on the chelation-enhanced fluorescence quenching (CHEQ) effect of the paramagnetic nature. The lowest detection limit is determined to be 15.8 nM, which is much lower than the allowable level of Cu2+ in drinking water set by U.S. Environmental Protection Agency (similar to 20 mu M) and the World Health Organization (similar to 30 mu M). The 1:1 binding process was confirmed by fluorescence measurements, IR analysis and DFT studies. Moreover, sensor ADA was successfully applied for determination of trace level of Cu2+ with 4 reuse cycles in various water samples, which affords promising potential in ion-detection field. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：411 / 417

页数：7

共 59 条

[1] A highly Selective Fluorescent Sensor for Monitoring Cu2+ Ion: Synthesis, Characterization and Photophysical Properties [J].