Synthesis and Characterization of Substituted Metal(II)-octa- MethoxyphenylImino Phthalocyanine Pigments

Abstract

The synthesis, spectral and magnetic susceptibility on symmetrically substituted metal (ΙΙ)-octa-methoxyphenyl imino phthalocyanine by condensing octa amino phthalocyanines with o-anisaldehyde are described. The dark green colour octa amino phthalocyanine derivatives were characterized by electronic, IR, elemental analysis, magnetic susceptibility, powder X-ray diffraction and thermo gravimetric analysis (TGA) studies to structural integrity, check the purity and crystalline properties of the pigments. The variation of magnetic moment as function of field strength 2.20 to 4.01 kg indicated the presence of intermolecular co-operative effect

Synthesis and Characterization of Metal (II) Phthalocyanine Containing N, N-Dimethyl Phenyl Moieties

“…Magnetic susceptibility studies by using a Gouy balance and at room temperature (301 o K). Diamagnetic corrections is calculate were used Pascal's constants [18][19] . A calibrant used as a mercury tetra thiocyanato cobalt(II) complex and doubly distilled H 2 O was used in the experiments.…”

“…Thermogravimetric and DTA analysis is carried out by using Perkin-Elmer Thermal analyzer at the rate of 10 0 C/min in air and nitrogen atmosphere. EXPERIMENTAL 4-nitrophthalic acid was prepared as per literature 19 and other solvents and reagents used were analytical grade. The substituted metal(II) tetra-nitro phthalocynanines and metal(II) tetraaminophthalocyanines were prepared by the reported procedure 19 .…”

“…EXPERIMENTAL 4-nitrophthalic acid was prepared as per literature 19 and other solvents and reagents used were analytical grade. The substituted metal(II) tetra-nitro phthalocynanines and metal(II) tetraaminophthalocyanines were prepared by the reported procedure 19 . These complexes converted into imino substituted complexes by condensation reaction 20 .…”

“…The magnetic moments of CuTDMPhImPc and CoTDMPhImPc are higher values than the spinspin only value corresponding to the one unpaired electron 1.73BM, due to the blending of higher energy state (b 2g ) 2 , (e g ) 3 , (a 1g ) 2 orbital with ground state (b 2g ) 2 , (e g ) 4 , (a 1g ) 1 orbitals degenerate states and inter-molecular cooperative effect 23 . As per the literature the magnetic field is higher than the higher magnetic moment values at lower field strength due to magnetic anisotropy of phthalocyanine coupled with intermolecular magnetic interaction [17][18][19][20] .…”