Enhanced Sensitivity and Accuracy of Tb³⁺-Functionalized Zirconium-Based Bimetallic MOF for Visual Detection of Malachite Green in Fish.

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). Moreo

SUBMITTER: Zhou Y 

PROVIDER: S-EPMC11395321 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature