1. Freie Universität Berlin, Institute of Chemistry and Biochemistry; Takustr. 3 D-14195 Berlin Germany
2. Helmholtz-Zentrum Berlin, F-ISFM Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
3. Martin-Luther-Universität Halle-Wittenberg, Institute of Physics - NMR; Betty-Heimann-Str., 7 D-06120 Halle/Saale Germany