1. Macromolecular Chemistry and Bavarian Polymer Institute University of Bayreuth Universitätsstrasse 30 95440 Bayreuth Germany
2. Department of Chemistry Inorgnaic Chemistry III and Northern Bavarian NMR Centre (NBNC) University of Bayreuth Universitätsstrasse 30 95440 Bayreuth Germany
3. Department of Chemistry Physical Chemistry III University of Bayreuth Universitätsstrasse 30 95440 Bayreuth Germany