Construction of two metal-organic frameworks by rigid bis(triazole)and carboxylate mixed-ligands and their catalytic properties for CO2 cycloaddition reaction
Two metal-organic frameworks(MOFs)containing rigid bis(triazole)ligand,namely {[Zn2(L)(TP)2(H2O)·H2O]}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),H2TP=terephthalic acid,H3TMA=1,3,5-benzenetricarboxylic acid,were synthesized by using acid-base mixed ligands strategy and structurally characterized by X-ray single-crystal diffraction.Structural analysis reveals that MOF 1 displays a 3,6-connected 2D structure with a new topological point symbol of(42·6)2(48·66·8),while MOF 2 presents a 2D sql topology structure.The catalytic studies reveal that 2 exhibits excellent catalytic activity for the cycloaddition reaction of CO2 with epoxides under mild conditions.Furthermore,2 can be reused at least three times while maintaining its catalytic ability.CCDC:2296181,1;2296182,2.
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