INVESTIGATIONS INTO THE ENGINEERING OF INORGANIC-ORGANIC SOLIDS - HYDROTHERMAL SYNTHESIS AND STRUCTURE CHARACTERIZATION OF ONE-DIMENSIONAL MOLYBDENUM OXIDE POLYMERS

Two one-dimensional intercalating molybdenum oxide polymers have been synthesized using different structure-directing units under specific h ydrothermal conditions. MoO-0 (NaNH4Mo3O10) was synthesized using tetr amethylammonium hydroxide, and MoO-1(C6H18N2-Mo4O13) was synthesized u sing 1,6-hexanediamine. The two crystal structures have been determine d by the single-crystal X-ray diffraction method. Both consist of bund les of parallel molybdenum oxide chains interspersed with metals or or ganic cations which play the role of intercalating agent in the host s tructure. The Mo has a 6+ valence state and distorted octahedral coord ination. Mo-O has orthorhombic symmetry (Pnma, No. 62) with a = 8.407( 2) Angstrom, b = 7.603(2) Angstrom, and c = 14.350(3) Angstrom. MoO-1 has triclinic symmetry (P (1) over bar, No. 2) with a = 8.267(2) Angst rom, b = 8.986(2) Angstrom, c = 12.714(3) Angstrom, alpha 87.58(3)degr ees, beta = 76.48(3)degrees, gamma = 67.97(3)degrees. The study sugges ts that the structures and properties of intercalation-type molybdenum oxide polymers can be engineered by incorporating the structure-direc ting units, acidity, and the hydrothermal conditions.