Fig. 4. Pump-probe X-ray scattering for [Cu4(PCP)3]+.
Experimental pump-probe X-ray scattering signals corresponding to a 2 µs, 100 ps, and 1 ns delay from photoexcitation (black lines). Theoretical X-ray scattering difference for the DFT-based models calculated taking into account structural changes of [Cu4(PCP)3]+ as a result of the transition to the triplet state (red line). Fit that takes into account additionally the bulk solvent response due to ultrafast heating (blue line). The signal corresponding to 2 µs delay has been divided by 6.5 to match the scale.