Dual-ligand europium-based metal-organic frameworks and hydrogels for sensitive ratiometric fluorescent detection of tetracyclines in food.

ABSTRACT: Tetracycline (TC) residues in animal-derived foods pose potential risks to human health; thus, the establishment of detection methods with high accuracy, strong sensitivity, and easy operation is of considerable importance. Within the present work, a dual-emission fluorescent probe derived from a dual-ligand europium-based MOF (NH₂-BDC-Eu-DPA) was developed and thereafter integrated into a fluorescent hydrogel to enable the rapid detection of TCs in animal-derived foods. The probe uses Eu³⁺ as the metal node, with 2-aminoterephthalic acid (BDC-NH₂) and pyridine-2,6-dicarboxylic acid (DPA) as dual ligands. Upon excitation at 260 nm, it exhibits dual fluorescence peaks at 427 nm and 617 nm. TCs can specifically quench the fluorescence at these two wavelengths

SUBMITTER: Guo R 

PROVIDER: S-EPMC12768328 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature