Figure 2.

(A) SADS and associated lifetimes for Spx in n-hexane upon 475-nm excitation at RT. Note that the third SADS has been expanded by a factor of 2. (B). Target analysis by using the kinetic model shown (Inset). The arrows indicate exponential decays, with the numbers being the corresponding lifetimes, in picoseconds. The spectra represent the difference absorption of each state (S₂, S₁, and S*), normalized to a concentration of unity. The spectrum of S* was set to zero above 605 nm (see text for details).