Comparative studies of photophysicochemical properties of non-peripherally anisole/thioanisole-tetrasubstituted gallium(III) phthalocyanines containing oxygen/ sulfur bridge

Abstract

In this work, we have presented the synthesis and characterization of gallium(III) phthalocyanines (4-6) which are non-peripherally tetra-substituted with anisole or thioanisole functional groups containing oxygen or sulfur bridge. Confirmation of the phthalocyanine structures performed with the cooperation of elemental analysis, FTIR,1 H-NMR, UV-Vis and MALDI-MS spectral data. Also, we have investigated and discussed the effects of non-peripherally tetra-substitution with different functional groups on the photochemical and photophysical properties (singlet oxygen quantum yield, photodegradation quantum yield, fluorescence quantum yield and fluorescent behavior). In every substituent, we obtained very similar singlet oxygen quantum yields as 0.64 for (4), 0.56 for (5) and 0.65 for (6) suggesting their potential as photosensitizer in PDT treatment.