1. Technical University of Munich, Department of Chemistry, Lichtenbergstrasse 4, 85748 Garching near Munich, Germany
2. Technical University of Munich, Catalysis Research Center, Ernst-Otto-Fischer-Strasse 1, 85748 Garching near Munich, Germany
3. Clariant Produkte (Deutschland) GmbH, Waldheimer Strasse 13, 83052 Bruckmühl, Germany