Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 5, Issue 6, Pages 4992-5000Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b00393
Keywords
S and N codoped carbon dots; Water chestnut; Onion; Coenzyme A detection; Fluorescent probe
Categories
Funding
- National Natural Science Foundations of China [21327007, 21575031]
- Natural Science Foundations of Guangxi Province [2015GXNSFDA 139006, 2014GXNSFBA118047]
- BAGUI Scholar Program
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Fluorescent carbon dots (CDs) originated from natural biomass have been of great interest in recent years because of their superior optical and chemical properties. However, previously reported CDs used only one natural biomass as precursor, and the fluorescence quantum yield (QY) and long -wavelength emissions are usually weak, which restrict their further applications in biology-relevant fields. Here a green method was demonstrated for the preparation of S and N codoped fluorescent CDs (S,N/CDs) by adopting two natural biomasses (water chestnut and onion) as precursors. The fabrication process is simple and environmentally friendly. By hydrothermal heating of water chestnut and onion, monodispersed, highly fluorescent S,N/CDs (diameter 3.5 nm) were obtained. The carboxyl on the surface of S,N/CDs can bind to Cu(II) ion, resulting in the luminescence quenching of S,N/CDs. And coenzyme A (CoA) can restore the luminescence of S,N/CDs. Based on the above features of S,N/CDs, an innovative off on fluorescence probe was presented for high sensitivity determination of CoA. Under optimum conditions, the linear range for CoA detection is 0.03-40 mu M with a detection limit of 0.01 mu M. The developed off on nanoprobe was applied for the quantification of CoA in pig liver, and imaging of CoA in living T24 cells.
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