1. Department
of Chemistry, Physical Chemistry Division and INSTM, University of Pavia, Viale Taramelli 16, 27100 Pavia, Italy
2. Department
of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via G. Campi 183, 41125 Modena, Italy
3. Centre
de RMN à très hauts champs − Institut des Sciences Analytiques, 5 Rue de La Doua, 69100 Villeurbanne, France