Issue 16, 2023

Ratiometric detection of Cu2+ in water and drinks using Tb(iii)-functionalized UiO-66-type metal–organic frameworks

Abstract

As an important trace element in the human body, the concentration of Cu2+ has an important impact on the environment and human health, and its quantitative determination is of great significance in the fields of environmental protection and food safety. Here, a ratiometric fluorescent probe based on Tb(III)-functionalized UiO-66-type MOFs has been synthesized via a facile post-synthetic modification method by employing mixed linkers containing terephthalic acid and 2,6-pyridinedicarboxylic acid for Cu2+ detection. The blue fluorescence intensity at 440 nm from the ligands of MOFs does not change much with increasing Cu2+ concentrations and can be used as a reference signal, while the green fluorescence of Tb3+ can be rapidly and selectively quenched, causing fluorescence intensity at 547 nm to decrease. The probe can be used as a ratiometric sensor for Cu2+ detection with a good linear response and low detection limit. The use of the probe for the determination of Cu2+ in real water samples and drinks shows good practicality. This method for Cu2+ detection is simple, specific and visualized to meet the needs of environmental monitoring and food analysis and provides a new strategy for the construction of new copper ion fluorescent sensors to analyze complex samples.

Graphical abstract: Ratiometric detection of Cu2+ in water and drinks using Tb(iii)-functionalized UiO-66-type metal–organic frameworks

Supplementary files

Article information

Article type
Paper
Submitted
10 jan 2023
Accepted
03 mar 2023
First published
06 mar 2023

Anal. Methods, 2023,15, 1953-1958

Ratiometric detection of Cu2+ in water and drinks using Tb(III)-functionalized UiO-66-type metal–organic frameworks

P. Liu, R. Hao, W. Sun and J. Li, Anal. Methods, 2023, 15, 1953 DOI: 10.1039/D3AY00044C

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