Spectroscopic insights on imidazole substituted phthalocyanine photosensitizers: Fluorescence properties, triplet state and singlet oxygen generation

Imidazole substituted metal phthalocyanine (Pc) complexes were synthesized. UV–vis absorption, steady state and time-resolved fluorescence, as well as laser flash photolysis were used to measure the photophysical and photosensitizing properties. All the imidazole–phthalocyanine conjugates show high ΦT (quantum yield of excited triplet formation), high ΦΔ (singlet oxygen formation yield, >0.50) and good fluorescence properties (quantum yield Φf >...