1. Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide) University of Duisburg-Essen Universitätsstraße 5–7 45117 Essen Germany
2. Max Planck Institute for Chemical Energy Conversion (CEC) Stiftstrasse 34–36/ 45470 Mülheim an der Ruhr Germany
3. Institute of Organic Chemistry University of Duisburg-Essen Universitätsstraße 5–7 45117 Essen Germany