1. DWI an der
RWTH Aachen e.V.
and Institute of Technical and Macromolecular Chemistry, RWTH Aachen, Forckenbeckstrasse 50, 52056 Aachen, Germany
2. Supramolecular Chemistry Group,
Department of Organic Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium