Two new hybrid materials [Fe(bipy)(3)](3)[ZnW12O39(OH)Fe(bipy)(2)(H2O)](2) and [Fe(bipy)(3)](2)[CoW12O40] were obtained by hydrothermal synthesis. They contain [Fe(bipy)(3)](n+) (bipy=2,2 -bipyridyl; n = 2 or 3) cations and Keggin-type polyoxotungstate anions. Both have been characterized by elemental analysis, FT-IR spectroscopy, H-1-NMR spectrometry, and single crystal X-ray crystallography. The anion in the former salt features [Fe-II(bipy)(2)(OH2)](2+) units covalently bound via a W=O-Fe bridge to the protonated anion [ZnW12O39(OH)](5-). The latter salt contains discrete [CoW12O40](6-) anions.
Xie, J., Gilbert-Wilson, R., Moubaraki, B., Murray, K., & Wedd, A. (2010). A fe(bipy)2 unit fused to a Keggin polyoxotungstate anion. Australian Journal of Chemistry, 63(2), 252 - 256. https://doi.org/10.1071/CH09437