Fig. 1: Simultaneous tracking of femtosecond dynamics with X-ray scattering and emission.
a UV–visible absorption spectrum of [Fe(bmip)2]2+ in acetonitrile (ε—molar absorptivity) and its chemical structure (inset). λexc indicates the excitation wavelength at 400 nm. b Schematic of the experimental setup, adapted from ref. 27 with permission from the Royal Society of Chemistry. A jet of the sample solution (blue) is excited with 400 nm laser light (red) and followed by 8.5 keV X-ray probe beam (yellow). XSS is collected with a large area detector downstream, whereas Kα/Kβ XES are detected with two spectrometers positioned close to a 90° scattering geometry. c Time-resolved difference signals of XSS (Q—length of the scattering vector), d Time-resolved difference Fe Kβ XES spectra. e Time-resolved Fe Kα/Kβ XES and XSS traces (black: Kα at 6404.3 eV; blue: Kβ between 7056 and 7058.5 eV; red: XSS between 0.7 and 1.0 Å−1). Inset highlights the oscillatory component of the XES and XSS signals. Difference traces normalized to −1 at the minimum (Kβ scaled to maximize overlap with Kα). Source data are provided as a Source Data file.
