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Issue 1, 2013
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Zr(H2O)2EDTA modulated luminescent carbon dots as fluorescent probes for fluoride detection

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Abstract

A novel fluorescent probe (Zr(CDs–COO)2EDTA) has been designed for fluoride ion (F) content detection based on the competitive ligand reactions carried out between the carboxylate groups (–COOH) on the surface of the luminescent carbon dots (CDs) and F coordinated to Zr(H2O)2EDTA. The strong and stable fluorescence signal of this probe was quenched upon the addition of F as a result of the formation of the non-fluorescent complex Zr(F)2EDTA, due to the stronger affinity of F than the –COOH in the CDs to Zr(IV). The fluorescence change (ΔF) in this process was linear with respect to the content of F, ranging from 0.10 μM to 10 μM. The probe has been applied to F detection in toothpaste and water samples with satisfactory results. Moreover, the mechanism of this Zr(H2O)2EDTA modulated fluorescent probe for the detection of F was also discussed.

Graphical abstract: Zr(H2O)2EDTA modulated luminescent carbon dots as fluorescent probes for fluoride detection

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Article information


Submitted
18 Jun 2012
Accepted
16 Oct 2012
First published
19 Oct 2012

Analyst, 2013,138, 278-283
Article type
Paper

Zr(H2O)2EDTA modulated luminescent carbon dots as fluorescent probes for fluoride detection

J. Liu, L. Lin, X. Wang, L. Jiao, M. Cui, S. Jiang, W. Cai, L. Zhang and Z. Zheng, Analyst, 2013, 138, 278
DOI: 10.1039/C2AN36055A

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