Abstract:

A new layered vanadium selenite (2,2′-bipy)(H₂O)V₂SeO₇ was prepared under hydrothermal conditions, and characterized by elemental analysis, IR and single crystal X-ray diffraction analysis．The  compound crystallized in a triclinic system, P₁ space group, a=0.842 93(2) nm,
b=0.928 67(3) nm, c=0.970 95(2) nm, α=97.037(2)°, β=110.806(2)°, γ=98.385 (2)°, V=0.690 3(3) nm3, Z=2, R₁=0.022 5, wR₂=0.069 3. The  compound, (2,2′-bipy)(H₂O)V₂SeO₇, has a layered structure constructed from eight membered rings 
{V₆Se₂O₂₅}, six membered rings {V₄Se₂O₁₉}, four membered rings {V₂Se₂O₁₃} that were arranged alternately, and then extended into three dimensional supramolecular array through π-π stacking contacts of 2,2′-bipyridine molecules. The fluorescence spectrum shows that the title compound exhibits blue emission in the solid state at room temperature.

Key words: vanadium selenite, hybrid material, hydrothermal synthesis, fluorescence property