1. Department of Chemistry Ludwig-Maximilians-Universität (LMU), & Center for NanoScience (CeNS) Butenandtstrasse 11 81377 Munich Germany
2. Friedrich-Alexander-University Erlangen-Nürnberg (FAU) Computer-Chemistry-Center Department of Chemistry & Pharmacy Naegelsbachstrasse 25 91052 Erlangen Germany
3. Friedrich-Alexander-University Erlangen-Nürnberg (FAU) Department of Chemistry & Pharmacy Inorganic Chemistry Egerlandstrasse 1 91058 Erlangen Germany
4. School of Mathematics and Science Department of Chemistry Carl von Ossietzky University of Oldenburg 26111 Oldenburg Germany
5. Physikalisch-Technische Bundesanstalt (PTB) Braunschweig und Berlin Bundesallee 100 38116 Braunschweig Germany