The ultrafast transient absorption (TA) spectra were obtained following excitation at 400 nm, using a custom-designed pump-probe setup described elsewhere. For the analysis of the TA data, the software KiMoPack was employed. To eliminate any influence from coherent artifacts, the TA spectra were corrected for arrival time, and the time-resolution was restricted to 0.3 ps prior to analysis. In the analysis, a parallel compartmental model, expressed as I = N i=1 ai exp (-ki • t), was utilized, where each term corresponds to independent, first-order decay processes. Decay associated spectra (DAS) were employed to elucidate the N processes, with each process represented by the exponential pre-factors (ai).