Bisodium-substituted vanadium oxide cluster with encapsulated [VO4]4− core and its electrochemical property

A new hybrid compound [Cu(en)2]4[Na2VV14VIV2O42(VIVO4)]·2H2O (1) (en = ethylenediamine) has been hydrothermally synthesized. Single-crystal structural analysis indicates that compound 1 contains a novel bisodium-substituted [Na2V16O42(VO4)]8− cluster (abbreviated as Na2V16) with an encapsulated [VO4]4− core. The Na2V16 cluster exhibits a eight-connected model by providing eight terminal O atoms to link eight [Cu(en)2]2+ units, generating a three-dimensional (3D) network with 412·63 topology. Furthermore, the electrochemical property of 1 has been studied.

Graphical abstractA new 3D framework with an 6-connected topology based on a novel bisodium-substituted [Na2V16O42(VO4)]8− cluster encapsulated with [VO4]4− core has been successfully isolated and structurally characterized.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Novel bisubstituted [Na2V16O42(VO4)]8− cluster encapsulated with [VO4]4− core. ► The important role of big and highly charged [SO4]4− and [PO4]3− anions. ► The uncommon CV behavior of the title compound.