Assembling nanosized ring-shaped synthons to an anionic layer structure based on the synergetically induced functional complementarity of their surface-sites: Na₂₁[Mo^VI₁₂₆Mo^V₂₈O₄₆₂H₁₄(H₂O)₅₄(H₂PO₂)₇]·xH₂O (x ≈ 300)

Abstract

The reaction of an aqueous solution of sodium molybdate with hypophosphorous (phosphinic) acid acting both as reducing agent and ligand at low pH values (≈1) results in the formation of nanosized ring-shaped cluster units which assemble to form layers of the compound Na₂₁[Mo^VI_126^- Mo^V₂₈O₄₆₂H₁₄(H₂O)₅₄(H₂PO₂)₇]·xH₂O 1 (x ≈300); the assemblage is based on the synergetically induced functional complementarity of amphiphilic OMoL (L = H₂O, H₂PO₂^-) groups and corresponds to the replacement of H₂O ligands of rings by related terminal MoO groups of other rings (and vice versa) the nucleophilicity of which is induced by coordinated H₂PO₂^- ligands.