Chromium(III)-doped carbon dots: fluorometric detection of p-nitrophenol via inner filter effect quenching

We report on the synthesis of chromium(III)-doped carbon dots (Cr-CDs) by one-pot hydrothermal pathway using tris(2, 4-pentanedionato) chromium(III) and polyethyleneimine as precursors. The Cr-CDs have a graphene-analogous structure and display blue-green fluorescence with excitation/emission maxima...

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Bibliographic Details
Published in:Mikrochimica acta (1966) 2019-06, Vol.186 (6), p.384-384, Article 384
Main Authors: Li, Chunmei, Zheng, Youkun, Ding, Hongwei, Jiang, Hui, Wang, Xuemei
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Fluorescence
Microengineering
Nanochemistry
Nanotechnology
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Summary:We report on the synthesis of chromium(III)-doped carbon dots (Cr-CDs) by one-pot hydrothermal pathway using tris(2, 4-pentanedionato) chromium(III) and polyethyleneimine as precursors. The Cr-CDs have a graphene-analogous structure and display blue-green fluorescence with excitation/emission maxima at 350/466 nm, a 20% quantum yield, and excitation-independent emissions. Their cytotoxicity is low. The Cr-CDs were used as a fluorescence probe for p -nitrophenol ( p -NP). The assay has a linear working range that extends from 0.8~150 μM and a 0.27 μM lower detection limit. The assay was applied to the detecting of p -NP in spiked human urine, and conceivably may be extended to a method for the determination of parathion. Graphical abstract Schematic presentation for the synthesis of Cr-CDs (chromium(III)-doped carbon dots) and their application to the fluorometric determination of p -NP ( p -nitrophenol) based on an inner filter effect.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-019-3444-3