期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 267, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2021.120627
关键词
Ratiometric sensing platform; 7-Amino-4-methylcoumarin; 2,3-Diaminophenazine; Visual fluorescence detection; Cu2+ detection
类别
资金
- Natural Science Foundation of Hunan Province [2021JJ41064]
- Department of Education of Hunan Province [18C0248]
- Research Fund of Central South University of Forestry and Technology [2016YJ054]
In this study, a new sensitive and selective colorimetric sensing platform using 7-amino-4-methylcoumarin (AMC) was developed for detecting Cu2+ in real samples. The platform achieved efficient semi-quantitative detection through fluorescence resonance energy transfer (FRET).
Cu2+ is a major environmental pollutant. An efficient measurement for Cu2+ is urgently needed. In this report, we have developed a new sensitive and selective ratiometric sensing platform using 7-amino4-methylcoumarin (AMC) for detecting Cu2+ in real samples. In the presence of Cu2+, o-phenylenediamine (OPD) could be catalytically oxidized to 2,3-diaminophenazine (DAP), which could react with AMC, leading to quench the fluorescence intensity of AMC at 438 nm. Meanwhile, DAP provided a new emission peak at 557 nm. Based on the efficient overlapped spectrum of AMC and DAP, a ratiometric sensing platform through fluorescence resonance energy transfer (FRET) was carried out. Furthermore, the as-proposed strategy displayed the linear relationship in the wide range from 6 to 250 lM with a low detection limit of 0.059 lM, and the recoveries of the spiked samples in real samples ranged from 86.5% to 110.1%. Moreover, comparing the visual fluorescence colors of the real samples with the standard colorimetric card, we used the as-proposed strategy as a solid-based platform for realizing an efficient semi-quantitative detection of Cu2+ via naked-eye visual fluorescence mode without any complicated instrument and operation. The above results implied that the as-proposed strategy could be used in the practice determination of Cu2+. (c) 2021 Elsevier B.V. All rights reserved.
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