Porous Zirconium Metal–Organic Framework Constructed from 2D → 3D Interpenetration Based on a 3,6-Connected kgd Net

A new porous zirconium metal-organic framework (Zr MOF), Zr6(μ3-O)4(μ3-OH)4(OH)6(H2O)6(BTB)2·6DMF·H2O (1; H3BTB = 5'-(4-carboxyphenyl)[1,1':3',1″-terphenyl]-4,4″-dicarboxylic acid), based on Zr6 clusters and tricarboxylate ligands has been constructed and characterized. The Zr6 clusters were linked by BTB ligands to generate a 2D network of kgd topology. The interpenetrations among the 2D networks gave rise to a 3D porous framework, which represents the first Zr MOF constructed from 2D → 3D interpenetration. The gas uptake and catalytic properties for 1 have also been studied.