Extended structure constructed from organic ligands functionalized sandwich-type tungstoferrates

Two new compounds constructed from mixture-valence {Fe6}-cluster-containing sandwich-type tungstoferrates functionalized by N-donor ligands, (H2enMe)5{FeIII2FeII2(HenMe)2[B-α-FeW9O34]2}∙12H2O (1) and (H2enMe)3FeII(enMe)2H2{FeIII2FeII2 (HenMe)2[B-α-FeIIIW9O34]2}∙13H2O (2) (enMe = 1,2-diaminopropane) have been synthesized under hydrothermal conditions. Compound 1 is an isolated {Fe6}-cluster-containing sandwich-type tungstoferrate functionalized by two enMe ligands. Compound 2 exhibits a 1-D chain-like structure composed of the sandwich-type polyoxoanions linked by iron linkers via the bridging oxygen atoms, representing the first extended structure based on tungstoferrates. Also, the sandwich-type polyoxoanions coordinating with the transition-metal (TM) linkers with the bridging oxygen atoms is rarely observed in the polyoxometalate (POM) chemistry.

A mixture-valence {Fe6}-cluster-containing sandwich-type tungstoferrate functionalized by two N-donor ligands has been synthesized under hydrothermal method, and the sandwich tungstoferrates are further linked by iron linkers via the bridging oxygen atoms into a 1-D chain-like structure.Figure optionsDownload as PowerPoint slideHighlights
► Compounds 1 and 2 are both based on the mixture-valence {Fe6}-cluster-containing sandwich-type tungstoferrates.
► The sandwich structures in these two compounds are both functionalized by two N-donor ligands.
► Compound 2 represents the first extended structure based on tungstoferrates.