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