Table 8. Spectrofluorimetric assessment of singlet oxygen generation by CURC and K2T23.

Solvent	[F(0)-F(10 min @ 280 nm)]/F(0)	[F(0)-F(10 min @ 420 nm)]/F(0)
Acetonitrile	0.83	0.78 (0.04)
Dimethylformamide	0.55	0.59 (0.08)
Methanol	0.39	0.33 (0.03)
Ethanol	0.44	0.35 (0.02)

Fractional fluorescence decrease of 9,10-dimethylanthracene in 10:1 dimethylanthracene:CURC mixtures in the solvents indicated in column 1 upon illumination of the sample with light at 280 nm (column 2) and 420 nm (column 3) for 10 minutes (see text for details). The results in parenthesis in column 3 were obtained with K2T23 as the photosensitizer.