Laser flash photolysis

The laser flash photolysis setup has been previously described²⁵. Laser flash photolysis experiments were carried out using Nd:YAG laser of 266 nm (30 mJ per pulse) and 355 nm (50 mJ per pulse) light pulses with a duration of 5 ns used as the pump light source. A xenon lamp was employed as analyzing light source. The laser and analyzing light beam passed perpendicularly through a quartz cell with an optical path length of 10 mm. The transmitted light entered a monochromator equipped with an R955 photomultiplier. The output signal from the Agilent 54830B digital oscilloscope was transferred to a personal computer for data treatment. The intensity of laser pulse was measured with a laser energy meter (Coherent EPM1000). TanI was dissolved in acetonitrile and the solutions were saturated with high-purity N₂ (≥ 99.99%), N₂O (≥ 99.5%), or O₂ (≥ 99.5%) for different purposes by bubbling for at least 20 min prior to experiments.