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

Two new interpenetrated ThSi2 networks, {[Ag4(bipy)4(ox)]·2OH·16H2O}n (1) and {[Ag2(dpb)2(ox)]·10H2O}n (2) (bipy = 4,4′-bipyridine, dpb = 1,4-di­(pyridin-4-yl)­benzene and Na2ox = 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.