Assembling nanosized ring-shaped synthons to an anionic layer structure based on the synergetically induced functional complementarity of their surface-sites: Na21[MoVI126MoV28O462H14(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^V ₂₈O₄₆₂H₁₄(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.