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Copper nanoclusters with strong fluorescence emission as a sensing platform for sensitive and selective detection of picric acid

Abstract

A facile, low-cost, and effective sensing strategy for detection of picric acid (PA) was developed based on copper nanoclusters (CuNCs). In this strategy, the high fluorescent CuNCs were prepared by using copper nitrate and ascorbic acid through an environmentally friendly process. Also, the PA-induced fluorescence quenching mechanism was investigated through ultraviolet-visible absorption spectra, fluorescence spectra, and fluorescence lifetimes, and may be ascribed to the molecular interactions and the strong inner filter effect between the CuNCs and PA. Under the optimal conditions, the fluorescence quenching degree of as-synthesized CuNCs was linearly dependent on the concentration of PA within a wide linear range of 2-40 μM, and the limit of detection was 0.98 µM. Finally, this proposed method was successfully applied to detect the levels of PA in real water samples.

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Publication details

The article was received on 18 Jun 2018, accepted on 27 Jul 2018 and first published on 30 Jul 2018


Article type: Paper
DOI: 10.1039/C8AY01357H
Citation: Anal. Methods, 2018, Accepted Manuscript
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    Copper nanoclusters with strong fluorescence emission as a sensing platform for sensitive and selective detection of picric acid

    W. J. Zhang, S. G. Liu, L. Han, Y. Ling, L. L. Liao, S. Mo, H. Q. Luo and N. Li, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C8AY01357H

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