Inorganic architecture based on a {[Ca(H2O)]6[P4W6O34]2}12– building block: Countercation effect on the lattice symmetry

Resumo

Three new salts of the {[Ca(H₂O)]₆[P₄W₆O₃₄]₂}^12– polyanion, namely (NH₄)₁₂{[Ca(H₂O)]₆∙[P₄W₆O₃₄]₂}∙ ∙24H₂O (1), H₂[Na(H₂O)_1.6]₁₀{[Ca(H₂O)]₆[P₄W₆O₃₄]₂}∙10H₂O (2), and [Ca(H₂O)₅]₆{[Ca(H₂O)]₆∙ ∙[P₄W₆O₃₄]₂}∙11H₂O (3) are prepared. The change in the lattice as a function of the countercation and its coordination, specially calcium, is investigated. Full characterization is made by single crystal X-ray diffraction and also UV-visible spectroscopy, FT-IR, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS).