Two new supramolecular assemblies based on Keggin-type polyoxometalates through Ag...O and π...π stacking interactions

Two new supramolecular assemblies based on Keggin-type polyoxometalates, [Ag3(4,4′-bipy)2(2,2′-bipy)2][Ag(2,2′-bipy)2][{Ag(2,2′-bipy)}HSiW11VO40] (1) and [Ag3(4,4′-bipy)2(2,2′-bipy)2][Ag(2,2′-bipy)2][{Ag(2,2′-bipy)}PW11VO40] (2) (4,4′-bipy = 4,4′-bipyridine, 2,2′-bipy = 2,2′-bipyridine), have been synthesized under the hydrothermal conditions and structurally characterized by IR, XPS, TG and single-crystal X-ray diffraction. Compound 1 has a 2D layer network structure via weak Ag...O interactions. Compound 2 is isostructural with compound 1. In addition, the fluorescence of compound 1 is reported.