Microporous <b>Eu-MOF</b> with Short 1,2,5-Thiadiazole-3,4-dicarboxylateLinkers: Luminescence Sensing of Nitrofuran Antibiotics and Gas AdsorptionPerformance

Lanthanide metal–organic frameworks combine the luminescent properties of rare earth elements with the structural tunability of molecular frameworks, making them ideal for multifunctional applications, such as luminescence sensing and gas separation. Herein, we report the synthesis of a red luminescent microporous <b>Eu-MOF</b> {[Eu₂(H₂O)L₃]·3H₂O}_<i>n</i> using 1,2,5-thiadiazole-3,4-dicarboxylic acid (H₂L) as the sole ligand. The H₂L ligand features an effective antenna effect for energy transfer and structural rigidity, enabling the formation of a robust microporous framework. Detailed structural analysis revealed its highly ordered microporosity. The <b>Eu-MOF</b> exhibited excellent luminescence sensing performance for detecting nitrofuran antibiotics, including nitrofurantoin (NFN) and nitrofurazone (NTZ), demonstrating high selectivity, low detection limits, and short sensing response time (both within 6 s). Furthermore, the microporous structure of <b>Eu-MOF</b> endowed it with exceptional adsorption properties, enabling effective methane–acetylene separation.