Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 77: Electronic Structure and Spin-Orbit Interaction III

O 77.13: Vortrag

Donnerstag, 14. März 2013, 19:00–19:15, H33

Probing the electronic structure of salt solutions by resonant inelastic soft X-ray scattering — •Sankaranarayanan Nagarajan¹, Frank Meyer², Andreas Benkert^2,3, Marcus Bär^4,5, Regan Wilks⁴, Wanli Yang⁶, Friedrich Reinert², Clemens Heske^3,5, Lothar Weinhardt^3,5, and Michael Zharnikov¹ — ¹Angew. Phys. Chemie, Universität Heidelberg — ²Exp. Phys. VII, Universität Würzburg — ³Inst. for Photon Science and Synchr. Radiation, Karlsruhe Institute of Technology — ⁴Sol. Energy Res., Helmholtz-Zentrum Berlin — ⁵Dept. of Chemistry, University of Nevada, Las Vegas — ⁶Advanced Light Source, Lawrence Berkeley National Laboratory

Salt addition to water induces changes in the hydrogen bond network. These changes can be monitored by Resonant Inelastic soft X-ray Scattering (RIXS) measurements, which provide information on the electronic structure of solids, liquids, gases, and (here) solutions. In this contribution, we present RIXS maps for the aqueous solutions of KCl and NaCl at different concentrations (from 1M to super-saturated solutions). Both resonant and non-resonant emission spectra derived from these maps are discussed in detail. We find changes in the positions and intensities of characteristic emission peaks as a function of salt concentration. The observed changes are rationalized in terms of structural perturbations induced by the salt, which, in turn, result in a change of the electronic structure.