Table 1. Decay Constants for the Individual Deactivation Steps Derived from Global Lifetime Analysis of the TRPES Spectra and Fitting a Triple Sequential Exponential Decay Model to the Integrated Time Tracesa.
| wavelength (nm) | energy (eV) | τ1 (fs) | τ2 (fs) | τ3 (ns) |
|---|---|---|---|---|
| 376 | 3.30 | 73 ± 25 | 861 ± 50 | >2 |
| 361 | 3.43 | 30 ± 25 | 626 ± 50 | >2 |
| 344 | 3.60 | 68 ± 25 | 484 ± 50 | >2 |
| 329 | 3.77 | 70 ± 20 | 420 ± 20 | >2 |
| 310 | 4.00 | 32 ± 20 | 277 ± 20 | >1.5 |
| 287 | 4.33 | 58 ± 20 | 350 ± 20 | >1 |
| 267 | 4.64 | 40 ± 20 | 240 ± 20 | 0.54 |
| 250 | 4.96 | 35 ± 20 | 245 ± 20 | 0.33 |
a
While τ1 and τ2 are extracted from a global fit to the short-range region (−1 to 3.5 ps), keeping the long time constant fixed, τ3 is extracted from a fit on the energy integrated long-range TRPES up to 300 ps. The error associated with each time constant is based on the uncertainty in the reproducibility of results across multiple TRPES experiments.