Two new coordination polymers with different architectures,[Co(bta)0.5(2,2'-bipy)(H2O)]n (1) and {[Cd2(bta)(H2biim)2(H2O)] ·H2O}n (2) (H4bta=bipheny1-2,2',6,6'-tetracarboxylic acid,2,2'-bipy=2,2'-bipyridine and H2biim=1H,1'H-2,2'-biimidazole) have been hydrothermally prepared by the reaction of H4bta,the corresponding metal nitrate ions and second ligands,and characterized by X-ray diffraction.Both 1 and 2 are one-dimensional chains and crystallize in the monoclinic system with space group P21/c.The bta ligands in 1 and 2 adopt rη6,μ4-hexadentate and η5,μ4-pentadentate coordination modes,respectively,and the corresponding angles of two benzene rings in the ligands of each compound are 64.80° and 64.86°,respectively.1 and 2 exhibit high thermal stability up to 170 °℃ and 120 ℃,respectively.CCDC:814921,1; 814922,2.%通过2,2＇,6,6’-联苯四酸与相应金属硝酸盐和第二配体的水热反应合成了2个具有不同结构的配位聚合物[Co(bta)0.5(2,2’-bipy)(H2O)]n(1)和{[Cd2,(bta)(H2biim)2(H2O)]·H2O}n(2)(H4bta=2,2’,6,6’-联苯四酸,2,2'-bipy=2,2’-联吡啶,H2biim=1H,1’H-2,2’-联咪唑),并测定了其晶体结构.1和2都是一维链结构,并且1和2都属于单斜晶系,P21/c空间群.bta配体在1和2中分别采取η6,μ4六齿和η5,μ4-五齿配位模式,同时bta配体中2个苯环的夹角在化合物1和2中分别是64.80°和64.86°.1与2分别在170℃和120℃以下保持热稳定性.
展开▼
