Preparation and structural studies of metal(II)-1,3,8,10,15,17,22,24- octanitrophthalocyanines

Summary An efficient method for preparing pure 1,3,8,10,15,17,22,24-octanitrophthalocyanine derivatives of copper(II) (CuPON), cobalt(II) (CoPON) and nickel(II) (NiPON) has been developed. Elemental analysis, electronic spectra, i.r. spectra, magnetic susceptibility measurements, thermogravimetry and powder X-ray diffraction studies were done in order to check the purity, structural integrity, thermal stability and crystallinity of these complexes. Susceptibility measurements showed a variation in the magnetic moments of the complexes with magnetic field strength, indicating the presence of intermolecular cooperative effects.