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- Title
Enhanced Sensitivity and Accuracy of Tb 3+ -Functionalized Zirconium-Based Bimetallic MOF for Visual Detection of Malachite Green in Fish.
- Authors
Zhou, Yue; Jiang, Yuanyuan; Chen, Xiangyu; Long, Hongchen; Zhang, Mao; Tang, Zili; He, Yufang; Zhang, Lei; Le, Tao
- Abstract
The ratiometric fluorescent probe UiO-OH@Tb, a zirconium-based MOF functionalized with Tb3+, was synthesized using a hydrothermal method. This probe employs the fluorescence resonance energy transfer (FRET) mechanism between Tb3+ and malachite green (MG) for the double-inverse signal ratiometric fluorescence detection of MG. The probe's color shifts from lime green to blue with an increasing concentration of MG. In contrast, the monometallic MOFs' (UiO-OH) probe shows only blue fluorescence quenching due to the inner filter effect (IFE) after interacting with MG. Additionally, the composite fluorescent probe (UiO-OH@Tb) exhibits superior sensitivity, with a detection limit (LOD) of 0.19 μM, which is significantly lower than that of the monometallic MOFs (25 μM). Moreover, the content of MG can be detected on-site (LOD = 0.94 μM) using the RGB function of smartphones. Hence, the UiO-OH@Tb probe is proven to be an ideal material for MG detection, demonstrating significant practical value in real-world applications.
- Publication
Foods, 2024, Vol 13, Issue 17, p2855
- ISSN
2304-8158
- Publication type
Article
- DOI
10.3390/foods13172855