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A Heterometallic Ag-Eu MOF: Sensitive Fluorescence Detection of 2-Methylhippuric Acid and High-Performance Proton
Zhilin Mu1, Dechao Li1, Yefang Yang1
1College of Chemistry and Chemical Engineering, Inner Mongolia University, Inner Mongolia Key Laboratory of Rare Earth Catalysis, Hohhot 010021, China.
None:
The functionalization of metal-organic frameworks (MOFs) enables fluorescence sensing and proton conduction, making them crucial in the fields of environmental monitoring and fuel cells. In this study, a heterometallic MOF of {[EuAg(TDA)2(H2O)]·H2O}n (1) was successfully constructed via a hydrothermal method using a thiodiglycolic acid (H2TDA) ligand and Ag+/Eu3+ ions as metal centers. The structural characterization confirmed that 1 was a three-dimensional framework and exhibited good chemical stability. The fluorescence sensing experiments showed that 1 could be used as a fluorescence sensor for identifying 2-methylhippuric acid (2-MHA) with a detection limit as low as 16.6 nM, featuring rapidity, sensitivity, anti-interference, and good recycling performance, and its potential sensing mechanism had further been analyzed. Additionally, the electrical conductivity of 1 was 1.27 × 10-3 S cm-1 at 98% relative humidity and 333 K, indicating its potential as a proton conductive material. Hence, this multifunctional heterometallic MOF demonstrates significant application potential in both optical sensors and proton conductors.
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