The efficacy of a molecule to generate singlet oxygen is

For comparison, two photosensitizers in ethanol, Foscan and chlorin e6, have efficiencies of 30% [42] and 65% [43], respectively. Foscan has been approved for treatment while chlorin e6 is still in the trial phase. In the experiment for the compounds dissolved in ethanol, we obtained about a 10% increase in the efficiency of singlet oxygen generation in comparison with our previously results in methanol (Porphyrins 1, 2, 3) and toluene (Porphyrin 4) [16].