Figure 1.

Transient absorption spectra of a) 1 and b) 2 10⁻⁴ M CH₃CN solutions, purged with Ar, irradiated at 266 nm by LFP. c) Decay traces monitored at 470 nm of CH₃CN solutions of 1 in presence of Ar (blue line) or O₂ (red line); d) decay traces of solutions of 1 (violet line) and 2 (green line) monitored at 370 nm, in the presence of O₂.