A Fluorine-Functionalized Tb(III)-Organic Framework for Ba Detection.

The development of lanthanide-organic frameworks (Ln-MOFs) using for luminescence sensing and selective gas adsorption applications is of great significance from an energy and environmental perspective. This study reports the solvothermal synthesis of a fluorine-functionalized 3D microporous Tb-MOF with a face-centered cubic () topology constructed from hexanuclear clusters (TbO) bridged by fdpdc ligands, formulated as {[Tb(fdpdc)(-OH)(HO)]·4DMF} (), (fdpdc = 3-fluorobiphenyl-4,4'-dicarboxylate). Complex displays a 3D framework with the channel of 7.2 × 7.2 Å (measured between opposite atoms) perpendicular to the -axis. With respect to Ba cation, the framework of activated () exhibits high selectivity and reversibility in luminescence sensing function, with an LOD of 4.34665 mM. According to the results of simulations, compared to other small gas molecules (CO, N, H, CO, and CH), activated () shows a high adsorption selectivity for CH at 298 K.