1. Laboratorium für Organische Chemie; ETH Zürich; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
2. Department of Chemistry and Pharmacy and; Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-University Erlangen-Nuremberg; Egerlandstrasse 3 91058 Erlangen Germany
3. Laboratoire d'Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie-UMR 7177, C.N.R.S.; Université de Strasbourg; 4, rue Blaise Pascal 67000 Strasbourg France
4. Department of Chemistry and Pharmacy; Computer Chemistry Center; Friedrich-Alexander-University Erlangen-Nuremberg; Nägelsbachstraße 25 91052 Erlangen Germany