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Regensburg 2013 – scientific programme

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O: Fachverband Oberflächenphysik

O 77: Electronic Structure and Spin-Orbit Interaction III

O 77.13: Talk

Thursday, March 14, 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 Benkert2,3, Marcus Bär4,5, Regan Wilks4, Wanli Yang6, Friedrich Reinert2, Clemens Heske3,5, Lothar Weinhardt3,5, and Michael Zharnikov11Angew. 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.

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