Figure 3. Transient absorption kinetics for triads 1 and 2 in deaerated toluene solution measured at 300 K: (O ) Rise of the absorption at 550 nm for triad 1. The solid line shows a fit to the data with a lifetime of 85 ns. (l )Rise of the absorption at 550 nm for triad 2. The solid line shows a fit to the data with a lifetime of 110 ns. (n ) Decay of the transient absorption at 690 nm for triad 2. The solid line is a two-exponential fit to the decay with lifetimes of 110 ns (relative amplitude = 85%) and 4.6 m s (relative amplitude = 15%). The D A values for 1 at 550 nm have been normalized to those of 2 at the absorption maxima, and the D A values for 2 at 690 nm have been multiplied by 40.