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Quantum yields for singlet oxygen (ΦΔ) measured pulsed laser 355 nm excitation of tocopherolquinones. Perinaphthenone in oxygen-saturated solutions in the same solvents was used as the quantum yield standard taking ΦΔ = 0.95 in all cases.
| Compound | Solvent | Saturating Gas |
ΦΔ ± SD |
|---|---|---|---|
| PMHC-Q | Ethanol | O2 | 0.76 ± 0.03 |
| Air | 0.59 ± 0.03 | ||
| Methanol | O2 | 0.85 ± 0.03 | |
| Air | 0.70 ± 0.03 | ||
| Acetonitrile | O2 | 0.72 ± 0.05 | |
| Cyclohexane | O2 | 0.93 ± 0.08 | |
| α-TQ | Ethanol | O2 | 0.80 ± 0.03 |
| Air | 0.63 ± 0.04 |
