Two interpenetrating 3D MOFs constructed by bis(imidazole) and V-shape carboxylate co-ligands: synthesis, structure, gas adsorption and photoluminescent properties

摘要

Two 3-D MOFs, {[Co-2(oba)(2)(bmip)]DMA}(n) (1) and [Cd(1,3-bdc)(bmip)](n) (2), where H(2)oba=4,4-oxybis(benzoic acid), 1,3-bdc=isophthalic acid and bmip=1,3-bis(2-methylimidazolyl)propane, were synthesized under solvothermal conditions and characterized by single-crystal X-ray diffraction, powder XRD, FT-IR, TGA, and elemental analysis. Complex 1 features a 3-D3-D twofold interpenetrating framework, and topological analysis shows the framework can be described as a 6-connected uninodal pcu net having the point symbol (4(12).6(3)). Complex 2 shows a 3-D3-D threefold interpenetrating network that can be described as a 4-connected uninodal cds net with (6(5).8) topology. Gas adsorptions of 1 were carried out, and photoluminescent properties of 1 and 2 were also investigated at room temperature.