1. Department of Chemistry, University of Oslo, P.O. Box 1033, N-0315 Oslo, Norway,
2. Université de Lyon, LCOMS, UMR 5265 C2P2 CPE-UCBL1-CNRS Bâtiment 308 ; 43 Boulevard du 11 Novembre 1918; F-69616, Villeurbanne, France
3. Department of Chemistry IFM & NIS Centre of Excellence, University of Torino, Via Quarello 11, I-10125 Torino, Italy