Hydrothermal synthesis,characterization and magnetic properties of a new 2D arsenic-vanadate layers supported cobalt coordination complex:[Co(en)2(H2O)]{[Co(en)2]_2As8V_(14)O_(42)(SO4)} · 3H2O

摘要

The title compound [Co(en)2(H2O)]{[Co(en)2]2As8V_(14)O_(42)(SO4)} · 3H2O(1)(en = ethylenediamine)has been hydrothermally synthesized and characterized by single crystal X-ray diffraction,IR spectrum and thermogravimetric analysis.The single crystal diffraction analysis shows that compound 1 exhibits {[Co(en)2As8V_(14)O-(42)(SO4)}n~(2+-)layers act as ligand of coordination cations [Co(en)2]~(2+),and water molecules are inserted in the layers.The magnetic measurement indicates a weak antiferromagnetic exchange coupling within the molecular unit,which is deemed to attribute to the contribution of V~(iv)and Co~(2+).