1. Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstrasse 32, 47798 Krefeld, Germany
2. Institute for Physical Chemistry, University Duisburg-Essen, Universitätsstrasse 5, 45141 Essen, Germany
3. Computational Biochemistry, University of Duisburg-Essen, Universitätsstrasse 2, 45141 Essen, Germany