Synthesis, characterization, photophysical and photochemical properties of tetra-2-[2-(benzothiazolylthio)]ethoxy substituted phthalocyanine derivatives

The metal-free and zinc (II) phthalocyanine compounds tetra substituted with 2-(2-benzothiazolylthio)ethoxy groups have been synthesized for the first time in this study for comparison central metal effect on photophysical and photochemical properties. The new compounds have been characterized by IR, 1H NMR, 13C NMR and MS spectra data. These compounds showed excellent solubility in most common organic solvents. The photophysical and photochemical properties of metal-free and zinc (II) phthalocyanine compounds have been studied in DMF and toluene in order to investigate of polar and non-polar solvent effect on these properties. The fluorescence quenching behaviour of the studied compounds by 1,4-benzoquinone (BQ) have also been studied in DMF and toluene.