Two novel Keggin tungstocobaltates grafted by cobaltII complex group(s): K[Co(phen)2(H2O)]2[HCoW12O40]·2H2O and [Co(2,2′-bipy)3]1.5{[Co(2,2′-bipy)2(H2O)][HCoW12O40]}·0.5H2O

Two novel Keggin tungstocobaltate hybrid compounds grafted cobalt(II) coordination groups: K[Co(phen)2(H2O)]2[HCoW12O40]·2H2O (1) and [Co(2,2′-bipy)3]1.5{[Co(2,2′-bipy)2(H2O)] [HCoW12O40]·0.5H2O (2)(phen = 1,10′phenanthroline, bipy = bipyridine) have been synthesized under hydrothermal conditions by directly using Keggin POMs as starting materials. Compound 1 exhibits interesting pseudo-1D chainlike architectures assembled by potassium ions bridged bi-grafted Keggin units. Compound 2 represents mono-grafted Keggin tungstocobaltate derivatives with one point five [Co(2,2′-bipy)3]2+ counteractions which construct 1D supermolecular chain via H-bonding interactions