1. Laboratory of Supramolecular Chemistry and Technology and MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
2. Laboratory of Organic Chemistry, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands
3. Department RGL, Akzo Nobel Central Research, P.O. Box 9300, 6800 SB Arnhem, The Netherlands
4. Department of Polymers and Organic Chemistry, Philips Research, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands