1. Institute of Inorganic Chemistry, University of Göttingen, Tammannstr. 4, D-37077 Göttingen, Germany
2. Department of Chemistry, University of Basel, CH-4056Basel, Switzerland
3. Institute of Theoretical Chemistry, University of Vienna, Währingerstraße 17, A-1090 Vienna, Austria
4. Department of Dynamics at Surfaces, Max-Planck-Institute for Multidisciplinary Sciences, Am Faßberg 11, D-37077 Göttingen, Germany
5. International Center for Advanced Studies of Energy Conversion (ICASEC), D-37077 Göttingen, Germany