Synthesis and characterization of S-bridge beta substition phtalocyanine

Phthalocyanines (Pcs) are 18 π-electron aromatic macrocycles comprising fourisoindole units linked together through their 1,3-positions by aza bridges. The particular two-dimensional electron delocalization over these macrocycles gives rise to a great number of unique physical properties. Thus, Phthalocyanines are chemically and thermally stable compounds that exhibit exceptional optical andelectrical behavior. For these reasons, they find wide application in the area ofmaterials science. In the present work, M {2(3), 9(10), 16(17), 23(24)--tetrakis(4-(methylthio) phenylthio) phthalocyanine} (M=2H, Zn, Co) were obtained from cylotetramerization reaction of 4-(4-(methylthio)phenylthio) phthalonitrile with corresponding appropriate [MX2] (X=Cl, X=Ac) in the presence of hexanol and 1,8-diazabisiklo[5.4.0] undeka-7-ene (DBU) as a strong at reflux temperature. All of the phthalocyanines were purified by chromatography. The elemental analysis, IR, UV-vis, 1H-NMR and MASS spectra confirm the proposed structures of the compounds. Keywords : Phthalocyanines, zinc, cobalt, metal-free, beta.