期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 208, 期 -, 页码 299-308出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2018.10.019
关键词
Fluorescent probe; Ratiometric; Dual-functional; Coumarin; Biological imaging
类别
资金
- National Natural Science Foundation of China [21576124, 21507047, 21676124]
- China Postdoctoral Science Foundation [2017M610308]
- Postdoctoral Science Foundation of Jiangsu Province [1701107B]
- Zhenjiang Social Development Project [SH2016019]
A dual-functional fluorescent probe based on coumarin fluorophore for monitoring ClO- and Cu2+ was synthesized and characterized. The identification mechanisms for ClO- and Cu2+ induced different calorimetric and ratiometric changes. ClO- caused a calorimetric change from yellow to colorless and 120 nm blue-shifted emission spectra from red to blue. Besides, Cu2+ induced a remarkable fluorescence quenching behavior and 36 nm blue-shifted absorption spectra accompanied by the color change from yellow to luminous yellow. As expected, Probe 1 displayed excellent selectivity and sensitivity for detecting ClO- and Cu2+ over other competing ions in their respective systems. The limits of detection for ClO- and Cu2+ were 24.62 nM and 0.39 nM, respectively. The recognition mechanisms were proved by H-1 NMR, mass spectrum and theoretical calculations. More importantly, the reversibility of Cu2+ could be applicable to rapid quantification for ClO- /Cu2+. Thus, the strategy for sensing ClO-/Cu2+ was carried out, which revealed broad applications of Probe 1 in multiple actual water and biology. (C) 2018 Elsevier B.V. All rights reserved.
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