Figure 3.
Transient absorption spectra measured at the indicated delay times after laser pulse excitation of 0.6 mM HN2O
at pH 7 (0.1 M phosphate). Open symbols: O2-saturated solution; closed symbols: Ar-saturated solution. The solid line is calculated by using Eq. 13 with y = 0.25 and ΔC = 0.052 mM; the dashed lines are visual aids only. (Inset) Kinetic traces recorded at 315 nm for O2- and Ar-saturated solutions; the short negative-going signal at the time origin is caused by laser stray light.