Figure 3.

(a) Femtosecond TA spectra with 400-nm excitation of Ru-ip-3T in ct DNA solution. The spectrum at 1 μs is extracted from the ns-TA spectrum of Ru-ip-3T in ct DNA solution with contribution from emission subtracted from the overall spectra. (b) DAS for Ru-ip-3T in ct DNA solution. The intense band at at 460 nm in the 1-ps spectrum is due to Raman scattering by water. (c) DAS for Ru-ip-3T in water. (d) Transient absorption kinetics recorded at 660 nm of Ru-ip-3T in ct DNA solution versus water following excitation at 400 nm. Data for Ru-ip-3T in water were reported elsewhere.33