Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 11, Issue 6, Pages 1981-1988Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b03559
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Funding
- ETH Zurich
- Swiss National Science Foundation (SNSF) through the NCCR-MUST
- Swiss National Science Foundation (SNSF) [20021_172946]
- ERC [772797-ATTOLIQ]
- Marie-Curie fellowship [798176]
- ETH Career Seed Grant [SEED-12 19-1]
- Marie Curie Actions (MSCA) [798176] Funding Source: Marie Curie Actions (MSCA)
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Femtosecond X-ray absorption spectroscopy (XAS) is a powerful method to investigate the dynamical behavior of a system after photoabsorption in real time. So far, the application of this technique has remained limited to large-scale facilities, such as femtosliced synchrotrons and free-electron lasers (FEL). In this work, we demonstrate femtosecond time-resolved soft-X-ray absorption spectroscopy of liquid samples by combining a sub-micrometer-thin flat liquid jet with a high-harmonic tabletop source covering the entire water-window range (284-538 eV). Our work represents the first extension of tabletop XAS to the oxygen edge of a chemical sample in the liquid phase. In the time domain, our measurements resolve the gradual appearance of absorption features below the carbon K-edge of ethanol and methanol during strong-field ionization and trace the valence-shell ionization dynamics of the liquid alcohols with a temporal resolution of similar to 30 fs. This technique opens unique opportunities to study molecular dynamics of chemical systems in the liquid phase with elemental, orbital, and site sensitivity.
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