Synthesis and Properties of Tetra[4,5](2,4,5-Trichlorophenoxy)Phthalocyanine Metal Complexes

Abstract

n order to study the effect of phthalocyanine periphery modification by halogens on spectral and other properties of phthalocyanine derivatives, the synthesis of cobalt, nickel and copper complexes of tetrakis[4,5](2,4,5-trichlorophenoxy)phthalocyanine was carried out by the "nitrilic" method using 4,5-di(2,4,5-trichlorophenoxy)phthalonitrile and corresponding metal acetates on heating at 180–200 °C. All compound structures were confirmed by elemental analysis, MALDI-TOF spectrometry, IR and electronic absorption spectroscopy. The ability of the synthesised metallophthalocyanines to dissolve in concentrated sulfuric acid, dimethylformamide, and chloroform was investigated. The effect of metal on the position of the Q band in elect-ronic absorption spectra of synthesized compounds is studied. The possibility of the synthesized phthalocyanine metal complexes to manifest mesomorphism characteristic of discotic mesogens was evaluated. According to the performed mesomorphism prediction, the studied compounds are unable to form mesomorphic state of the specified type. These theoretical calculations are in a good agreement with the experimental data (the coincidence is 100 %).