A layered vanadium arsenate network decorated with the directly coordinated organonitrogen ligands: [V4O7(HAsO4)2(o-phen)2] (o-phen=o-phenanthroline) |
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Authors: | Dongrong Xiao Enbo Wang Yangguang Li Yu Hou |
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Affiliation: | a Department of Chemistry, Institute of Polyoxometalate Chemistry, Northeast Normal University, Changchun Jilin 130024, People's Republic of Chinab 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 |
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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. |
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Keywords: | Organic-inorganic hybrid Layered vanadium arsenate Hydrothermal synthesis Directly coordinated organic ligands |
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