A Fluorine-Functionalized Tb(III)–Organic Framework for Ba2+ 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 (fcu) topology constructed from hexanuclear clusters (Tb6O30) bridged by fdpdc ligands, formulated as {[Tb6(fdpdc)6(μ3-OH)8(H2O)6]·4DMF}n(1), (fdpdc = 3-fluorobiphenyl-4,4′-dicarboxylate). Complex1displays a 3D framework with the channel of 7.2 × 7.2 Å2(measured between opposite atoms) perpendicular to thea-axis. With respect to Ba2+cation, the framework of activated1(1a) 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 (CO2, N2, H2, CO, and CH4), activated1(1a) shows a high adsorption selectivity for C2H2at 298 K.