A Novel Mo—Doped Compound with Graphite—Like Structure：[H3O]2V3O8

The hydrothermal reaction of Na2MoO4·2H2O, V2O5 and en in water gave rise to a graphite-shaped vanadate [H3O]2V3O8 1, which is doped with molybdenum. Compound 1 crystallizes in tetragonal system, space group P4bm, H6O10V2.9Mo0.1, Mr = 323.37, a = 8.904(1), c =5.573(1) ?, V = 441.8(1) ?3, Z = 2, Dc = 2.431 g·cm-3, ( = 3.137 mm-1, F(000) = 314, the final R = 0.0477, wR = 0.0993 for 260 observed reflections. Its two-dimensional framework is built up by corner-shared {VVO4} tetrahedra and {VIVO5} square pyramids with all of the terminal oxygen atoms toward the same orientation and further connected inta three-dimensional framework through hydrogen bonding between the protoned water molecules.