Synthesis, characterization, and investigation of photochemical properties of tetra-substituted zinc phthalocyanines bearing 4-(3,5-dimethyl-1H-pyrazol-1-yl)phenyl moiety with different linker heteroatoms

•The novel zinc phthalocyanines bearing 4-(3,5-dimethyl-1H-pyrazol-1-yl)phenyl groups.•The aggregation behavior of zinc phthalocyanines in water-organic solvent mixtures.•The investigation of the quantum yields of singlet oxygen.•The effect of linker heteroatom on the photophysical and photochemical properties.