One-dimensional hybrid polyoxometalate based on tetra-cobalt sandwiched phosphotungstate units

A one-dimensional polyoxotungstate, Na(H₂O)₂[Co(en)₃]₃H₃[Co₄(H₂O)₂(B-α-PW₉O₃₄)₂]·10.5H₂O(en=ethylenediamine), was hydrothermally synthesized and characterized by single crystal X-ray diffraction,infrared spectroscopy,thermogravimetric analysis,and powder X-ray diffraction, respectively.The structure was constructed from the[Co₄(H₂O)₂(B-α-PW₉O₃₄)₂]^- units, in which a tetra-cobalt cluster core was sandwiched between two PW₉O₃₄^9- polyanions,that were further connected via Na⁺ cations forming a one-dimensional chain structure.