Auxiliary Ligand-tuned Structural Variation of Cd(Ⅱ) Coordination Polymers: Synthesis,Crystal Structures and Luminescent Properties

摘要

Two new Cd(Ⅱ) coordination polymers, [Cd(PT)(1,4-BDC)0.5]_n(1) and [Cd(PT)(1,3-BDC)0.5]_n(2)(HPT = 3-(pyridin-2-yl)-1,2,4-triazole, 1,4-H2 BDC = 1,4-benzenedicarboxylic acid, 1,3-H2 BDC = 1,3-benzenedicarboxylic acid), have been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction as well as elemental analysis and IR. Complexes 1 and 2 are both three-dimensional coordination polymers with two-dimensional sheet structures bridged by the deprotonated carboxylate ligands. In 1, 1,4-BDC^(2-) bridges the layered network to generate a quadrangular framework, and 2 owns a sexangular framework, which was caused by the different steric hindrance between 1,4-BDC^(2-) and 1,3-BDC^(2-). Their thermal stabilities and photoluminescent properties have been also investigated.