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- W4319015569 abstract "Abnormal levels of biothiols in the human body are closely related to a variety of diseases, thus it is crucial for the selective detection of biothiols in the biological system. In this work, a Fe3+-triggered multifunctional nitrogen-doped carbon quantum dots (N-CQDs) on–off-on fluorescent sensing platform for the ultrasensitive detection of biothiols (GSH, Cys and Hcy) was successfully established. In detail, Fe3+ could adsorb on the surface of N-CQDs through coordination with the phenolic hydroxyl group of N-CQDs, resulting in the quenching of the fluorescence of N-CQDsdue to the photoinduced electron transfer (PET) effect from N-CQDs to Fe3+. After the addition of biothiols, there was stronger coordination between Fe3+ and biothiols than N-CQDs-Fe3+, resulting in fluorescence recovery of N-CQDs. On basis of the on–off-on principle, the N-CQDs-Fe3+ fluorescent probe was applied to determine biothiols. Under optimal parameters, the N-CQDs-Fe3+ fluorescent probe exhibited a relatively lower limit of detection (LOD) of 20.39 nM (GSH), 9.31 nM (Hcy) and 1.93 nM (Cys), respectively, which was better or comparable compared with previous reports. Further, the constructed N-CQDs-Fe3+ fluorescent sensing platform was validated with strong anti-interference ability, good reproducibility and repeatability, and also performed well in serum samples, demonstrating a promising potential in clinical diagnosis for biothiols analysis." @default.
- W4319015569 created "2023-02-03" @default.
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- W4319015569 date "2023-05-01" @default.
- W4319015569 modified "2023-09-30" @default.
- W4319015569 title "On–Off–On fluorescent sensing platform based on nitrogen-doped carbon dots for biothiols detection" @default.
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- W4319015569 doi "https://doi.org/10.1016/j.jphotochem.2023.114595" @default.
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