1. Department of Chemistry, Division of Molecular Imaging and Photonics, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
2. Department of Chemistry, Laboratory of Self-Assembling Systems, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
3. Laboratory for Chemistry of Novel Materials, Université de Mons, Place du Parc 20, 7000 Mons, Belgium