X-ray free-electron laser (XFEL) sources have garnered significant attention due to novel light-source properties: unprecedented peak power, an excellent transverse coherence, and femtoseconds pulse duration. These unique capabilities are highly beneficial for research in nonlinear physics, structural biology, and ultrafast chemistry.
In ultrafast chemistry, XFEL serves as a probe in pump-probe experiments, enabling the capture of transient non-equilibrium states induced by optical laser excitation. Beyond conventional optical-domain observables, optical-pump/X-ray-probe experiments offer unique opportunities to investigate structural changes with sub-angstrom resolution and photocarrier dynamics with element specificity.
This presentation highlights our recent studies [1,2] utilizing time-resolved X-ray spectroscopies and time-resolved X-ray solution scattering. By tracking nuclear dynamics of a prototypical copper(I)-phenanthroline complex, we have clearly resolved the coherent vibrations associated with the pseudo Jahn-Teller distortion (ligand flattening). Furthermore, we revealed the bidirectional influence between solute and surrounding solvent molecules during this ligand flattening dynamics, offering deeper insights into solvation dynamics in liquid chemistry.
In ultrafast chemistry, XFEL serves as a probe in pump-probe experiments, enabling the capture of transient non-equilibrium states induced by optical laser excitation. Beyond conventional optical-domain observables, optical-pump/X-ray-probe experiments offer unique opportunities to investigate structural changes with sub-angstrom resolution and photocarrier dynamics with element specificity.
This presentation highlights our recent studies [1,2] utilizing time-resolved X-ray spectroscopies and time-resolved X-ray solution scattering. By tracking nuclear dynamics of a prototypical copper(I)-phenanthroline complex, we have clearly resolved the coherent vibrations associated with the pseudo Jahn-Teller distortion (ligand flattening). Furthermore, we revealed the bidirectional influence between solute and surrounding solvent molecules during this ligand flattening dynamics, offering deeper insights into solvation dynamics in liquid chemistry.
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