1. Department
of Chemistry and
Polymer Science, University of Stellenbosch, 7602 Matieland, South Africa
2. SciTe, Ridder Vosstraat 6, 6162 AX Geleen,
The Netherlands
3. Polymer Chemistry
and Materials,
Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium