Two Unusual Two-dimensional 4,4 Network Cadmium Coordination Polymers Based on Flexible Bistriazole and Rigid Benzenedicarboxylate Co-ligands

Two cadmiumII coordination polymers {[CdbtpNO2-1,3-bdcH2O]·H2O}n 1 and {[Cdbtp1,2-bdcH2O]·H2O}n 2 were synthesized by the reaction of 1,3-bis1,2,4-triazol-1-ylpropane btp, 5-nitroisophthalate NO2-1,3-bdc, and 1,2-benzenedicarboxylate 1,2-bdc. 1 consists of undulated 2D 4,4 networks. Two identical undulated layers are parallel stacking to give a 2D→2D polythreaded 2D network. A 3D supramolecular architectute is constructed through the hydrogen bond interactions. 2 has an unusual 2D 4,4 network with a thickness of ca. 10A. The btp ligands exhibit the anti-gauche conformation in 1 and the anti-anti conformation in 2. The flexible btp ligand exhibits the key role in the assembly of the topologies of 1 and 2. The luminescence and thermal stability were investigated.