Copper nanoclusters with strong fluorescence emission as a sensing platform for sensitive and selective detection of picric acid
| Autor: | Liu Li Liao, Wen Jie Zhang, Nian Bing Li, Hong Qun Luo, Shi Gang Liu, Yu Ling, Shi Mo, Lei Han |
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| Rok vydání: | 2018 |
| Předmět: |
Detection limit
Copper nanoclusters Absorption spectroscopy General Chemical Engineering General Engineering Picric acid 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Ascorbic acid 01 natural sciences Fluorescence 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound Linear range chemistry Filter effect 0210 nano-technology |
| Zdroj: | Analytical Methods. 10:4251-4256 |
| ISSN: | 1759-9679 1759-9660 |
| DOI: | 10.1039/c8ay01357h |
| Popis: | A facile, low-cost, and effective sensing strategy for detection of picric acid (PA) was developed based on copper nanoclusters (CuNCs). In this strategy, highly 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 might 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, the proposed method was successfully applied to detect the levels of PA in real water samples. |
| Databáze: | OpenAIRE |
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