1. Laboratory for Polymer Synthesis, KU Leuven, Celestijnenlaan 200F, Box 2404, B-3001 Heverlee, Belgium
2. Organic Synthesis and Mass Spectrometry Laboratory, Research Institute for Materials Science and Engineering, University of Mons-UMONS, 23 Place de Parc, B-7000 Mons, Belgium
3. Laboratory for Molecular Electronics and Photonics, KU Leuven, Celestijnenlaan 200D, Box 2425, B-3001 Heverlee, Belgium