AI Article Synopsis
- The UiO-OH@Tb probe is a fluorescent sensor made from a zirconium-based metal-organic framework (MOF) that uses a hydrothermal process for synthesis and is designed to detect malachite green (MG) through fluorescence resonance energy transfer (FRET).
- As the concentration of MG increases, the probe changes color from lime green to blue, while a simpler MOF variant (UiO-OH) only shows blue fluorescence quenching, demonstrating the enhanced performance of the composite probe.
- The UiO-OH@Tb probe has a very low detection limit of 0.19 μM for MG, making it significantly more sensitive than the monometallic version,
Article Abstract
The ratiometric fluorescent probe UiO-OH@Tb, a zirconium-based MOF functionalized with Tb, was synthesized using a hydrothermal method. This probe employs the fluorescence resonance energy transfer (FRET) mechanism between Tb 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11395321 | PMC |
| http://dx.doi.org/10.3390/foods13172855 | DOI Listing |
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