Green Emission Carbon Nanodots as Fluorescence Turn-on Probe for Detecting Picolinic Acid

Autor:	Wei Wang, Yu-Jie Ding, Zhong-Xia Wang, Xing Jin
Rok vydání:	2021
Předmět:	inorganic chemicals Detection limit Hydroquinone Chemistry chemistry.chemical_element Picolinic acid Fluorescence Analytical Chemistry Boric acid chemistry.chemical_compound Reagent lipids (amino acids peptides and proteins) Boron Carbon Nuclear chemistry
Zdroj:	Journal of Analytical Chemistry. 76:920-929
ISSN:	1608-3199 1061-9348
DOI:	10.1134/s1061934821080037
Popis:	A new strategy for the determination of picolinic acid (PLA) is developed by utilizing green-emissive boron and nitrogen co-doped carbon nanodots (BNCNDs) and Cu2+ ion. Hydroquinone, uric acid and boric acid act as carbon, nitrogen and boron sources for BNCNDs synthesis, respectively. Interestingly, the green emission of BNCNDs is quenched in the presence of Cu2+ by electron transfer. Upon addition of the specific reagent (PLA), Cu2+ ion is removed from the surface of BNCNDs owing to the formation of a strong complex between PLA and Cu2+ ion, which leads to a significant fluorescence recovery of BNCNDs. The “turn-on” phenomenon allows to determine PLA by a very simple method. This chemosensing method displays a linear range from 50 nM to 80 μM with a detection limit of 14 nM (3σ/k) for PLA. The method was applied to the determination of PLA in fetal bovine serum samples with the recoveries between 94 and 106%, which shows that this method has potential for use in applications to real samples.
Databáze:	OpenAIRE
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