Selective CO2 capture and multiresponsive luminescent sensor in aqueous solutions of cadmium metal-organic framework based on trigonal rigid ligand

Abstract

We report here a new fashioned cd-metal-organic framework (MOF) exhibiting a (5, 6)-connected 2-nodal net, [Cd3(LMe)(H2O)]·DMF·3H2O constituted by two different metal clusters and a trigonal rigid 6-connected ligand. The analytic reveal that complex is a 3D structure. Each (LMe)6− ligand is linked to five dinuclear SBUs, which forms a 2D lay, and Cd1 ions are linked by two different deprotonated carboxylates to construct a 3D porous framework. IAST manifested that the selectivity coefficients under 1 bar for the N2/CO2 (85: 15) and CH4/CO2 (50: 50) compounds were 86 and 6 at 273 K, respectively. Complex exhibited selectivity of CO2 relative to N2 and CH4 upon removal of solvates. Moreover, the complex caused emission quenching in the existence of Fe3+, MnO4− and CHCl3 organic solvent molecules. The multi-response fluorescence probe has lofty sensitivity and low limit of detection in the existence of Fe3+ and MnO4−. It thus appears that the Cd-MOF is not only a useful strategy for CO2 capture, but a fluorescent transducer for simultaneous exploration of organic solvent, metal ions and inorganic anions.