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A layered vanadium arsenate network decorated with the directly coordinated organonitrogen ligands: [V4O7(HAsO4)2(o-phen)2] (o-phen=o-phenanthroline)
Authors:Dongrong Xiao  Enbo Wang  Yangguang Li  Yu Hou
Institution:
  • a Department of Chemistry, Institute of Polyoxometalate Chemistry, Northeast Normal University, Changchun Jilin 130024, People's Republic of China
  • b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China
  • Abstract:A novel layered vanadium arsenate V4O7(HAsO4)2(o-phen)2] 1 (o-phen=o-phenanthroline) was synthesized by the hydrothermal reaction of V2O5, ZnCl2, Na2HAsO4·7H2O, o-phenanthroline (o-phen) and water. Its structure was determined by elemental analyses, ESR spectrum, XPS spectrum, TG analysis, IR spectrum and the single-crystal X-ray diffraction. Compound 1 crystallizes in monoclinic system, space group P2/c, a=10.122(2) Å, b=9.867(2) Å, c=15.367(3) Å, β=102.83(3)°, V=1496.4(5) Å3, Z=1, λ(MoKα)=0.71073 Å, (R(F)=0.0397 for 3422 reflections). Data were collected on a Rigaku R-AXIS RAPID IP diffractometer at 293 K in the range of 2.06°<θ<27.48°. The title compound contains an unusual two-dimensional (2D) As-V-O layer with four-, six- and eight-membered rings. The chelating o-phen ligands project perpendicularly above and below the undulating layer. 1 represents the first example of 2D inorganic vanadium arsenate backbone grafted with the directly coordinated organic ligands. Furthermore, the 3D supermolecular architecture is formed by π-π stacking interactions of the o-phen groups between adjacent layers.
    Keywords:Organic-inorganic hybrid  Layered vanadium arsenate  Hydrothermal synthesis  Directly coordinated organic ligands
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