Three-Dimensional open-framework cobalt–molybdenum phosphate by hydrothermal synthesis: (C2H9N2)4(C2H10N2)[Co3Mo4P4O28]

The new three-dimensional open-framework cobalt(II) molybdenum(VI) phosphate, (C2H9N2)4(C2H10N2)[Co3Mo4P4O28] 1, has been prepared by the reaction of sodium molybdate, phosphoric acid and ethylenediamine with Co2+ salts. The crystal data for 1 are as follows: Tetragonal, space group I4(1)/a, a=17.088(2) Å, c=10.745(2) Å V=3137.7(9) Å3, Z=4. The structure of 1 is constructed from CoMo2P tetrahedral units connected by CoO4 tetrahedra through sharing corners. The connectivity leads to the formation of intersecting channels in all three crystallographic directions, resembling an aluminosilicate zeolite, and the channels are filled with charge-compensating ethylenediamine ions.