We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Probing hydrogen bond strength in liquid water by resonant inelastic X-ray scattering.
- Authors
Vaz da Cruz, Vinícius; Gel'mukhanov, Faris; Eckert, Sebastian; Iannuzzi, Marcella; Ertan, Emelie; Pietzsch, Annette; Couto, Rafael C.; Niskanen, Johannes; Fondell, Mattis; Dantz, Marcus; Schmitt, Thorsten; Lu, Xingye; McNally, Daniel; Jay, Raphael M.; Kimberg, Victor; Föhlisch, Alexander; Odelius, Michael
- Abstract
Local probes of the electronic ground state are essential for understanding hydrogen bonding in aqueous environments. When tuned to the dissociative core-excited state at the O1s pre-edge of water, resonant inelastic X-ray scattering back to the electronic ground state exhibits a long vibrational progression due to ultrafast nuclear dynamics. We show how the coherent evolution of the OH bonds around the core-excited oxygen provides access to high vibrational levels in liquid water. The OH bonds stretch into the long-range part of the potential energy curve, which makes the X-ray probe more sensitive than infra-red spectroscopy to the local environment. We exploit this property to effectively probe hydrogen bond strength via the distribution of intramolecular OH potentials derived from measurements. In contrast, the dynamical splitting in the spectral feature of the lowest valence-excited state arises from the short-range part of the OH potential curve and is rather insensitive to hydrogen bonding. Understanding how nuclear motions affect vibrational motions in molecular liquids remains challenging in modern condensed matter physics. Here the authors study the vibrational quantum effects in liquid water and show the sensitivity on the coherent evolution of OH bonds in core-excited states.
- Publication
Nature Communications, 2019, Vol 10, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-019-08979-4