期刊
DYES AND PIGMENTS
卷 172, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2019.107846
关键词
Carbon dots; Fluorescent probe; Turn-on; Fe3+; Ampicillin
资金
- National Natural Science Foundation of China [61805287]
- National Science Foundation of Hunan Province, China [2018JJ3632, 2019JJ50824]
- Fundamental Research Funds for the Central Universities [202045002]
- Basic Research Foundation of Shenzhen Science and Technology Innovation [JCYJ20180307151245919]
Carbon dots (CDs) with blue fluorescence were synthesized through hydrothermal treatment of p-dihydroxybenzene and hydrazine hydrate. The fluorescence of the investigated CDs could be selectively quenched by iron ions (Fe3+) because of the strong metal-ligand coordination and electrostatic interactions between the large amount of hydroxyl, amino, and carboxyl groups on CDs' surface and Fe3+. Interestingly, this non-fluorescent CDs + Fe3+ complex displayed a sensitive and selective turn-on fluorescence toward ampicillin with a limit of detection of 0.70 mu M. The sensing process could be observed by naked eyes under the 365 nm UV light irradiation. Importantly, CDs + Fe3+ complex had been successfully applied in the detection of ampicillin in river water.
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