1. Université libre de Bruxelles (ULB), Engineering of Molecular NanoSystems, Ecole polytechnique de Bruxelles, Avenue F. D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium
2. Centre d’Instrumentation en REsonance Magnétique (CIREM), Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP 160/08, B-1050 Brussels, Belgium
3. Namur Institute of Structured Matter and Namur Research Institute for Life Sciences, Department of Chemistry, University of Namur, 61 rue de Bruxelles, B-5000 Namur, Belgium