Synthesis of Subphthalocyanine Derivatives and Their Electrochemical and Spectroscopic Properties

Abstract

Six types of subphthalocyanine derivatives having fluoro, thiobutyl and thiophenyl substituents were synthesized. Their electrochemical and spectroscopic properties were studied from the results of cyclic voltammetry and UV-vis absorption and fluorescent spectroscopies.
In the absorption spectra of the subphthalocyanine derivatives having the substituents, absorption maxima shifted to longer wavelength in comparison with nonsubstituted subphthalocyanine. Absorption maxima for the substituted subphthalocyanine were close to that for phthalocyanine. From the result of the intensity of absorption maxima in UV-vis spectra, it was suggested that the non-planer framework of subphthalocyanine molecule turns into the planer structure by the introduction of electrophilic substituents. Since molecular weight of the subphthalocyanine derivatives was smaller than that of normal subphthalocyanine, the effect of substituent on electron density for the subphthalocyanine derivatives was thought to be greater.