1. Mass Spectrometry Laboratory, University of Liège, MolSys Research unit, Quartier Agora, Allée du Six Aout 11, B-4000 Liège, Belgium
2. LIST - Luxembourg Institute of Science and Technology, Materials Research and Technology Department, 41 rue du Brill, L-4422 Belvaux, Luxembourg
3. Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium