1. Department of Physics; University of Surrey; Guildford GU2 7XH United Kingdom
2. NMR Center, Institute of Organic Chemistry, Johannes Kepler University Linz; Altenbergerstraβe 69 4040 Linz Austria
3. DSM Coating Resins B.V; R & D, Sluisweg 12 Waalwijk 5145 PE The Netherlands