Hydrothermal Synthesis and Characterization of a Novel Two-dimensional Framework Materials Constructed from Polyoxometalate and Coordination Groups: H_2Mo_(5.5)V_(10.5)O_(40)(PO_4)Cu(en)_2_4·7H_2O

摘要

A novel compound [H2Mo 5.5V 10.5O 40（PO4）][Cu（en）2]4·7H2O（1） was synthesized from V2O5, MoO3, CuCl2·2H2O, en, H3PO4 and H2O in an aqueous solution via the hydrothermal method and characterized by means of single-crystal X-ray diffraction, elemental analyses, IR, EPR spectra and thermal analyses. C 16H 80Cu4Mo 5.5N 16O 51PV 10.5 crystallized in a triclinic system, the space group is P1 with M=2660.63, a= 1.283590（10） nm, b=1.289910（10） nm, c=1.387870（10） nm, V=1.80942（2） nm 3, Z=2, Dx=4.883 g/cm 3, F（000）=2599, μ=6.956 mm -1, （Δ/σ）=0.000, S=1.089. The crystal structure was solved by the direct methods with the final R=0.0752 and wR=0.1988 for 6311 observed reflections with I≥2σ（I）. The X-ray crystallography reveals that compound 1 is a novel two-dimensional framework material constructed from the mixed Mo/V polyoxometalate and coordination groups.