Different Benzendicarboxylate-Directed Structural Variations and Properties of Four New Porous Cd(II)-Pyridyl-Triazole Coordination Polymers.

Four new different porous crystalline Cd(II)-based coordination polymers (CPs), i. e., [Cd(mdpt)]·2HO (), [Cd(mdpt)(-bdc)(HO)] (), [Cd(Hmdpt)(-bdc)]·2HO (), and [Cd(mdpt)(bpdc)]·2.5NMP (), were obtained successfully by the assembly of Cd(II) ions and bitopic 3-(3-methyl-2-pyridyl)-5-(4-pyridyl)-1,2,4-triazole (Hmdpt) in the presence of various benzendicarboxylate ligands, i.e., 1,3/1,4-benzenedicarboxylic acid (-Hbdc, -Hbdc) and biphenyl-4,4'-bicarboxylate (Hbpdc). Herein, complex is a porous 2-fold interpenetrated four-connected 3D topological framework based on the mdpt ligand; reveals a two-dimensional (2D) network. Interestingly, presents a three-dimensional (3D) rare interpenetrated double-insertion supramolecular net 2D ···ABAB··· layers and can be viewed as an topological net, while complex displays a 3D framework. Then, the different gas sorption performances were carried out carefully for complexes and , the results of which showed has preferable sorption than that of and can be the potential CO storage and separation material. Furthermore, the stability and luminescence of four complexes were performed carefully in the solid state.