Synthesis and Characterization of a Heterometallic Extended Architecture Based on a Manganese(II)-Substituted Sandwich-Type Polyoxotungstate.

The reaction of [-P₂WO] with Mn and Dy in an aqueous basic solution led to the isolation of an all inorganic heterometallic aggregate Na(OH₂)[{Dy(H₂O)₆}₂Mn₄P₄WO(H₂O)₂]·17H₂O (). Single-crystal X-ray diffraction revealed that crystallizes in the triclinic system with space group P 1 ¯ , and consists of a tetranuclear manganese(II)-substituted sandwich-type phosphotungstate [Mn₄(H₂O)₂(P₂WO)₂] (), Na, and Dy cations. Compound exhibits a 1D ladder-like chain structure based on sandwich-type segments and dysprosium cations as linkers, which are further connected into a three-dimensional open framework by sodium cations. The title compound was structurally and compositionally characterized in solid state by single-crystal XRD, powder X-ray diffraction (PXRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TGA), and elemental analyses. Further, the absorption and emission electronic spectra in aqueous solutions of and were studied. Also, magnetic properties were studied and compared with the magnetic behavior of [Mn₄(H₂O)₂(P₂WO)₂].