Carbon dots@metal–organic frameworks as dual-functional fluorescent sensors for Fe3+ ions and nitro explosives
| Autor: | Jianing Xu, Junning Liu, Yufang Tao, Yong Fan, Li Wang, Yating Huang, Ping Zhang, Yansong Jiang, Xiao Dong Chen |
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| Rok vydání: | 2021 |
| Předmět: |
Detection limit
Materials science chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Fluorescence 0104 chemical sciences Ion Isophthalic acid chemistry.chemical_compound chemistry Nitro General Materials Science Metal-organic framework 0210 nano-technology Selectivity Carbon |
| Zdroj: | CrystEngComm. 23:4038-4049 |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/d1ce00392e |
| Popis: | Carbon dots (CDs) with excellent optical properties were encapsulated into two fluorescent metal–organic frameworks (MOFs), namely, [Cd(HL)]·0.8H2O (1) and [Cd3(L)2]·3H2O (2) (H3L = 4-(5-carboxypyridin-2-yl)isophthalic acid). The as-prepared CDs@1 and CDs+2 not only retained the strong fluorescence activity of CDs, but also embedded Eu3+ ions in the hybrids to form dual-emitting Eu3+/CDs@1 and Eu3+/CDs+2. These novel composites emitted strong red light at room temperature and exhibited good fluorescence sensing capabilities for Fe3+ ions, p-nitrotoluene (p-NT) and 2,4-dinitrophenol (2,4-DNP) in water solutions with detection limits of 0.034 μM, 0.0096 μM, 0.062 μM and 0.0111 μM. These results indicate that 1A and 2A (activated products of Eu3+/CDs@1 and Eu3+/CDs+2) could be regarded as potential dual-functional fluorescent sensors with superior sensitivity and excellent selectivity. |
| Databáze: | OpenAIRE |
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