1. Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
2. School of Engineering, Zurich University of Applied Sciences, Technikumstrasse 9, 8400 Winterthur, Switzerland
3. Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland