A novel inorganic-organic hybrid compound [Cu(dpq)2]4[As8V14O42(H2O)]·2H2O(dpq=dipyrido[3,2-d:2’,3’-f]quinoxaline) was synthesized under the hydrothermal condition and its structure was characterized via single-crystal X-ray diffraction,elemental analysis,IR and XPS spectra.The title compound crystallizes in a monoclinic crystal system,space group P21/c with crystal parameters a=1.8973(3) nm,b=2.5816(2) nm,c=2.8941(2) nm,β=106.61(2)°,V=13.5846(12) nm3,Z=4,R1=0.0674,wR2=0.1750.It possesses a spherical [As8V14O42(H2O)]4-cluster anion,four [CuI(dpq)2]+ counter cations and two lattice water molecules.The cationic complexes form ca.0.8 nm×0.8 nm stellate channels along the c axis through strong π…π stacking interactions due to the multiple aryls in the dpq ligands.The polyoxoanions are embedded in the channels through extensive C—H…O short contact interactions.
