Issue 10, 2021

Eu3+-functionalized CQD hybrid material: synthesis, luminescence properties and sensing application for the detection of Cu2+

Abstract

In this study, we developed a novel flexible method to construct a lanthanide dual-emitting ratiometric fluorescence nanoprobe with excellent luminescence properties and significant selectivity for the detection of copper ions, where the central Eu3+ ions are coordinated with 2,6-pyridinedicarboxylic acid (DPA) on the surface of CQDs. The structure and chemical sensing photoluminescence properties of the as-prepared fluorescent probe have been investigated in detail. Moreover, the results have shown that Eu-DPA–CQDs exhibit two fluorescence emissions at 450 nm and 613 nm, respectively, under an excitation wavelength of 285 nm. The responses of the two emissions towards Cu2+ ions are completely different and can provide references for each other. Therefore, it can be designed as a fluorescence sensor for the detection of Cu2+ ions. The emission spectrum at 613 nm is markedly quenched, while that at 450 nm slightly changed after the addition of Cu2+ ions. When the Cu2+ ion concentration was 0–150 μM, the FL ratio (IEu/ICQDs) showed a good linear relationship with the lowest detection limit (LOD) of 6 nM. Thus, the reported sensor has a high selectivity, satisfactory accuracy and precision, and it may provide the potential application in the biological and environmental fields.

Graphical abstract: Eu3+-functionalized CQD hybrid material: synthesis, luminescence properties and sensing application for the detection of Cu2+

Supplementary files

Article information

Article type
Paper
Submitted
24 Janv. 2021
Accepted
22 Marts 2021
First published
24 Marts 2021
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2021,2, 3346-3352

Eu3+-functionalized CQD hybrid material: synthesis, luminescence properties and sensing application for the detection of Cu2+

Y. Li, D. Liu, Y. Wang, F. Wang and H. Qiu, Mater. Adv., 2021, 2, 3346 DOI: 10.1039/D1MA00059D

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