1. Kekulé-Institute
of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
2. Mulliken
Center for Theoretical Chemistry, University of Bonn, Beringstr. 4, D-53115 Bonn, Germany
3. Department
of Chemistry, University of Jyväskylä, Nanoscience Center, P.O. Box 35, 40014 Jyväskylä, Finland
4. Department
of
Applied Chemistry, Faculty of Textile Technology, University of Zagreb, Prilaz baruna Filipovića
28a, HR-10000 Zagreb, Croatia