Angewandte Phys Chemie

Molecular structure of liquids & characterization of bio-objects in native (aqueous) environment

Isotope and temperature effects in liquid water probed by X-ray absorption and resonant X-ray emission spectroscopy

Phys. Rev. Lett. 100, 027801 (2008) and J. Phys. Chem. Lett. 5, 4143 (2014)

High-resolution x-ray absorption and emission spectra of liquid water exhibit a strong isotope effect. Further, the emission spectra show a splitting of the 1b1 emission line, a weak temperature effect, and a pronounced excitation energy dependence. They can be described as a superposition of two independent contributions. By comparing with gas phase, ice, and NaOH/NaOD, we propose that the two components are governed by the initial state hydrogen bonding configuration and ultrafast dissociation on the time scale of the O 1s core hole decay. In another work, similar approach has also been successfully applied to the analysis of the x-ray emission spectra of aqueous salt solutions.

Surface Science & Analytics - Prof. (apl.) Dr. Michael Zharnikov

Molecular structure of liquids & characterization of bio-objects in native (aqueous) environment

Isotope and temperature effects in liquid water probed by X-ray absorption and resonant X-ray emission spectroscopy