Three- and Eight-Fold Interpenetrated ThSi2 Metal-Organic Frameworks Fine-Tuned by the Length of Ligand

Two new interpenetrated ThSi2 networks, {[Ag-4(bipy)(4)(ox)]center dot 20H center dot 16H(2)O} ( I ) and {[Ag-2(dpb)(2)(ox)]center dot 10H(2)O} (2) (bipy = 4,4'-bipyridine, dpb = 1,4-di(pyridin-4-yl)benzene and Na(2)ox = sodium oxalate), were constructed from bidentate pyridyl-based organic tectons incorporating ox auxiliary ligand. Interestingly, both 1 and 2 are 3D frameworks with the same ThSi2 topology but with substantial changes in the interpenetration degrees, which are well controlled by employing the pyridyl-based ligands with different lengths. The thermal stabilities and photoluminescence behaviors of them were also discussed.