Abstract
Two new polytungstate-based compounds, [Co(mbpy)3][W6O19] (1) and [Ni(mbpy)3]2[VW12O40] (2) (mbpy = 4,4′-dimethyl-2,2′-bipyridyl), have been hydrothermally synthesized and characterized by IR spectroscopy, TG analysis, and single-crystal X-ray diffraction. Single crystal X-ray structural analyses demonstrate that the compounds consist of [M(mbpy)3]2+ (M = CoII or NiII) as cations anchored to W-containing polyoxoanions through non-covalent intermolecular interactions. The inorganic polyanions exhibit different cluster structures: Lindqvist-type [W6O19]2− isopolyoxoanion in 1; V-centered Keggin-type [VW12O40]4− heteropolyoxoanion in 2.
Acknowledgments
This work was financially supported by the Natural Science Foundation of China (no. 20701011), Doctoral Initial Foundation of Hebei Normal University (no. L2005B13), the Hebei Natural Science Foundation of China (no. B2011205035), and the Education Department Foundation of Hebei Province (no. Z2006436).