Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10636934 | Solid State Sciences | 2005 | 14 Pages |
Abstract
The temperature dependence of the hydrothermal chemistry of the oxovanadium-phenylphosphonate/copper(II)-bipyridine system has been investigated. Reactions of identical compositions of CuSO4â
5H2O, bipyridine, C6H5PO3H2 and Na3VO4 in H2O yielded [{Cu(bpy)}VO2(O3PC6H5)(HOC6H5)] (1), [{Cu3(bpy)3(H2O)}V4O9(O3PC6H5)4]â
3.9H2O (2â
3.9H2O) and [{Cu(bpy)}VO(O3PC6H5)2] (4) at 120â°C, 150â°C and 180-230â°C, respectively. Furthermore, variations in stoichiometry at 150â°C provided yet a fourth one-dimensional phase [{Cu(bpy)}2V3O6(O3PC6H5)3(HO3PC6H5)] (3). Substitution of a methyl substituent for the phenyl group yielded another one-dimensional material [{Cu(bpy)}V2O4(O3PCH3)2â
H2O (5â
H2O). The structural chemistry is discussed in terms of the polyhedral variability of vanadium oxides, the tendency of oxovanadium polyhedra to form oligomeric arrays, the variable modes of polyhedral connectivity associated with vanadium square pyramids and phosphorus tetrahedra and the steric influences of the copper(II)-bpy subunit.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Gundog Yucesan, Wayne Ouellette, Vladimir Golub, Charles J. O'Connor, Jon Zubieta,