Assembling nanosized ring-shaped synthons to an anionic layer structure based on the synergetically induced functional complementarity of their surface-sites: Na-21[(Mo126Mo28O462H14)-Mo-VI-O-V(H2O)(54)(H2PO2)(7)]center dot xH2O (x approximate to 300)

The reaction of an aqueous solution of sodium molybdate with hypophosphorou s (phosphinic) acid acting both as reducing agent and ligand at low pH valu es(approximate to 1) results in the formation of nanosized ring-shaped clus ter units which assemble to form layers of the compound Na-21[Mo-126(VI)- ( Mo28O462H14)-O-V(H2O)(54)(H2PO2)(7)]. xH(2)O 1 (x approximate to 300); the assemblage is based on the synergetically induced functional complementarit y of amphiphilic O=MoL (L = H2O, H2PO2-) groups and corresponds to the repl acement of H2O ligands of rings by related terminal Mo=O groups of other ri ngs (and vice versa) the nucleophilicity of which is induced by coordinated H2PO2- ligands.