Abstract
Boron doped carbon dots (B-CD) were synthesized by a one-step hydrothermal method using phenylboronic acid as the starting material. They have an average size of about 3.3 nm, with excitation/emission wavelength of 247/323 nm and a quantum yield of 12%. The B-CD is shown to be viable fluorescent probe for sorbate (PS) and vitamin B12 (VB12). The fluorescence (FL) of the B-CD is quenched in the presence of PS or VB12 mainly coming from inner filter effect (IFE), but Förster resonance energy transfer (FRET) from the B-CD (as a donor) to PS/VB12 (as an acceptor) cannot be excluded. The probe enables PS to be detected by fluorometry with a linear response in the 0.20–24 μM concentration range and a 6.1 nM detection limit (at 3σ/slope). For VB12, the data are 0.20–30 μM and 8.0 nM.
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Acknowledgements
The authors gratefully acknowledge financial support from Sichuan Provincial Science & Technology Fund for Applied Fundamental Research (2016JY0080), Doctor Start-up Fund (15E006) of China West Normal University, and Talent research fund of China West Normal University (17YC012).
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Jia, Y., Hu, Y., Li, Y. et al. Boron doped carbon dots as a multifunctional fluorescent probe for sorbate and vitamin B12. Microchim Acta 186, 84 (2019). https://doi.org/10.1007/s00604-018-3196-5
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DOI: https://doi.org/10.1007/s00604-018-3196-5