1. Paul Scherrer Institute 5232 Villigen Switzerland
2. Department of Chemistry and Applied BiosciencesLaboratory of Physical ChemistryETH Zürich 8093 Zürich Switzerland
3. Present address: Givaudan Schweiz AG 8310 Kemptthal Switzerland
4. Gymnasium Lerbermatt 3098 Köniz Switzerland
5. Hochschule Luzern - Technik & Architektur 6048 Horw Switzerland