Fig. 4: X-ray solution scattering.
a Time dependent x-ray solution scattering (XSS) difference signal. The red box indicates the region used to extract the low-Q difference signal shown in b. The black box indicates the region used to extract the time dependent bulk water temperature increase. Source data are provided as a Source Data file. b Comparison of the ligand-to-metal charge transfer (LMCT) population fraction determined from the x-ray emission data (blue) and the scaled XSS low-Q difference signal (red) collected with small time bins to resolve the signal rise time. For the LMCT population fraction, the uncertainty at each time delay was estimated using a cutoff in the increase of the sum of squared residuals when varying the population fraction with respect to the optimized value. For the XSS low-Q difference signal, uncertainties reflect the standard deviation of kinetic traces within the 0.25–0.3 Å−1 range, when all traces are rescaled to the mean summed difference signal magnitude within that Q-range.
