Figure 2.

Effect of pH on the transient absorbance at 445 nm from pulse radiolysis of N₂-saturated aqueous solutions containing Trol-Q (200 μmol dm⁻³), 2-methylpropanol (0.1 mol dm⁻³) and phosphate buffer (10 mmol dm⁻³). Inset:- First order rate constant for decay of the transient absorbance of the semiquinone radical at 440 nm versus oxygen concentration in solutions containing 2-methylpropanol (0.1 mol dm⁻³) and phosphate buffer (10 mmol dm⁻³, pH 7.3).