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.
