1. Laboratoire de Chimie Supramoléculaire Institut de Science et d'Ingénierie Supramoléculaires (ISIS) Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
2. Dipartimento di Scienze Chimiche, Biologiche Farmaceutiche ed Ambientali Università di Messina Viale F.S. D'Alcontres 31 98166 Messina Italy
3. Current address: CARBOGEN AMCIS AG Hauptstrasse 171 CH-4416 Bubendorf Switzerland
4. Current address: Department of Chemistry University of Cambridge Lensfield Road CB2 1EW Cambridge United Kingdom
5. Current address: University of Chemistry and Technology Prague Technická 5 166 28 Prague Czech Republic