刚性双(三氮唑)和羧酸混合配体构建的两种金属有机骨架材料及其在CO_(2)环加成反应中的催化性质

Construction of two metal-organic frameworks by rigid bis(triazole)and carboxylate mixed-ligands and their catalytic properties for CO_(2)cycloaddition reaction

通过酸碱混合配体策略合成了2例含刚性双三氮唑配体的金属有机骨架(MOF)材料:{[Zn_(2)(L)(TP)_(2)(H_(2)O)·H_(2)O]}_n1)和[Zn(L)(HTMA)]_n(2),其中L=4,4'-(3,3'-dimethyl-(1,1'-biphenyl)-4,4'-diyl)bis(4H-1,2,4-triazole),H_(2)TP=对苯二甲酸,H_(3)TMA=1,3,5-均苯三甲酸。用单晶X射线衍射表征其结构。结构分析表明,MOF 1显示出3,6-双节点的二维结构,其拓扑符号为(4^(2)·6)_(2)(4^(8)·6^(6)·8),MOF 2呈现为经典的sql二维拓扑结构。在温和条件下,2对CO_(2)与环氧化物的环加成反应具有优异的催化活性,且重复使用至少3次后仍然保持其催化性能。

Two metal-organic frameworks(MOFs)containing rigid bis(triazole)ligand,namely{[Zn_(2)(L)(TP)_(2)(H_(2)O)·H_(2)O]}_n(1)and[Zn(L)(HTMA)]_n(2),where L=4,4'-(3,3'-dimethyl-(1,1'-biphenyl)-4,4'-diyl)bis(4H-1,2,4-triazole),H_(2)TP=terephthalic acid,H_(3)TMA=1,3,5-benzenetricarboxylic acid,were synthesized by using acid-base mixed ligands strategy and structurally characterized by X-ray single-cry stal diffraction.Structural analysis reveals that MOF 1 displays a 3,6-connected 2D structure with a new topological point symbol of(4^(2)·6)_(2)(4^(8)·6^(6)·8),while MOF 2 presents a 2D sql topology structure.The catalytic studies reveal that 2 exhibits excellent catalytic activity for the cycloaddition reaction of CO_(2)with epoxides under mild conditions.Furthermore,2 can be reused at least three times while maintaining its catalytic ability.CCDC:2296181,1;2296182,2.