New compounds constructed from bi-antimony capped Keggin polyoxoanions and different coordination fragments

Two new compounds [Cu(enMe)2][Cu(enMe)2(H2O)][SiMoV6MoVI6Sb2O40] (1) and [Ni(en)2]2[SiMoV6MoVI6Sb2O40] (2) (enMe = 1,2-diaminopropane, en = 1,2-ethylenediamine) have been hydrothermally synthesized and characterized by IR, UV–Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), powder XRD analyses, elemental analyses and single crystal X-ray diffraction. The two compounds represent the first examples of hybrids based on bi-antimony capped Keggin polyanions {SiMo12Sb2O40} and different transition metal coordination complexes.

The first compounds constructed from bi-antimony capped Keggin polyoxoanions {SiMo12Sb2O40} and different coordination fragments, namely [Cu(enMe)2][Cu(enMe)2(H2O)][SiMoV6MoVI6Sb2O40] (1) and [Ni(en)2]2[SiMoV6MoVI6Sb2O40] (2) (enMe = 1,2-diaminopropane, en = 1,2-ethylenediamine), have been synthesized and characterized by IR, XPS, XRD, TG, elemental analyses and single-crystal X-ray diffraction. Compound 1 exhibits a zigzag chain structure, while compound 2 presents a supramolecular structure..Figure optionsDownload as PowerPoint slideHighlights
► The first compounds formed by {SiMo12Sb2O40} and transition metal complexes.
► Supramolecular compounds based on C–H⋯O and N–H⋯O hydrogen bonds.
► Compound 1 based on {SiMo12Sb2O40} and [Cu(enMe)2]2+ exhibits a chain structure.
► Compound 2 based on {SiMo12Sb2O40} and [Ni(en)2]2+presents a layered structure.