Singlet-oxygen-sensitized delayed fluorescence: direct detection of triplet phthalocyanine as an intermediate

Research was conducted to examine an intermediate that was detected in the process of singlet-oxygen-sensitized delayed fluorescence using C60 as the sensitizer and tetra-tert-butylphthalocyanine (Pc) as the fluorescer. Results demonstrate that the dimol mechanism cannot be responsible for the singlet-oxygen-sensitized delayed fluorescence from phthalocyanines. Other reports support the findings since the low triplet energy measured for Pc allows substantial concentrations of 3Pc to be formed.