One-step synthesis of green emission carbon dots for selective and sensitive detection of nitrite ions and cellular imaging application

In recent years, carbon dot (CD)-based fluorescent sensors for selective ions or small biomolecules have drawn great attention. In this work, highly fluorescent CDs (QY = 21%) were prepared from 2,3-diamino pyridine as the precursor through a facile solvothermal process. The CDs showed high stabilit...

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Bibliographic Details
Published in:RSC advances 2020-03, Vol.1 (17), p.167-175
Main Authors: Zan, Minghui, Li, Cong, Liao, Fei, Rao, Lang, Meng, Qian-Fang, Xie, Wei, Chen, Bei, Qie, Xingwang, Li, Li, Wang, Liang, Dong, Wen-Fei, Liu, Wei
Format: Article
Language:English
Subjects:
Biocompatibility
Biomolecules
Carbon dots
Chemistry
Emission spectra
Fluorescence
Nitrogen dioxide
Quenching
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Summary:In recent years, carbon dot (CD)-based fluorescent sensors for selective ions or small biomolecules have drawn great attention. In this work, highly fluorescent CDs (QY = 21%) were prepared from 2,3-diamino pyridine as the precursor through a facile solvothermal process. The CDs showed high stability and a green emission in aqueous, and the optimal emission wavelength of CDs is 508 nm under the excitation wavelength of 438 nm. Interestingly, a CDs-based nanoprobe was developed for a selective and sensitive fluorescence quenching response to NO 2 − in water, and the quenching mechanism was investigated in the work. Besides, the recovery rates of NO 2 − in the range of 98-103.5% were found to be acceptable, indicating that the proposed CDs could be act as potential candidates for determination of nitrite ions in real samples. Meanwhile, the nanoprobe was also successfully employed in a visualization biosensing platform for determination of NO 2 − in living cells due to its eminent biocompatibility. Schematic route of the carbon dots and their applications for the nitrite detection.
ISSN:2046-2069
2046-2069
DOI:10.1039/c9ra11009g