1. Institute of Physical and Theoretical Chemistry Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
2. Department of Chemistry Philipps-University of Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany
3. Institute of Inorganic Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
4. Laboratory for Synchrotron Radiation and Femtochemistry Paul Scherrer Institut (PSI) 5232 Villigen Switzerland