1. Otto Diels Institute of Organic ChemistryChristiana Albertina University of Kiel Otto-Hahn-Platz 3–4 24118 Kiel Germany
2. Department of Chemistry and Center for NanoScience (CeNS)University of Munich (LMU) Butenandtstrasse 11 81377 Munich Germany
3. Department of Chemistry EducationLeibniz Institute for Science and Mathematics Education Olshausenstrasse 62 24118 Kiel Germany