Open-framework zinc and cobalt phosphates synthesized by the tributylphosphate route

Abstract

By employing tributylphosphate as the source of phosphorus, several open-framework zinc and cobalt phosphates have been prepared hydrothermally. Of the three new zinc phosphates [C₆N₂H₁₈][Zn(HPO₄)₂], I, has a linear chain structure while [C₄N₂H₁₄][Zn₅(PO₄)₄(H₂O)], II, [NH₄][H₃O][Zn₄(PO₄)₃]₂·H₂O, III, have three-dimensional structures. Of the three new cobalt phosphates described, [C₅N₂H₁₄][Co(HPO₄)₂], IV, and [C₅N₂H₁₄][Co(HPO₄)₂], V, have linear chain structures, while [C₄N₂H₁₂]₃ [Co₂(OH)(HPO₄)₃]₂, VI, has a complex double chain structure. The study shows that the use of the organophosphate yields a variety of architectures of metal phosphates.