1. Department of Chemistry, Center for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1033, N-0315 Oslo, Norway
2. ProfMOF A/S, Kirkegårdsveien 45, 3616 Kongsberg, Norway
3. Department of Chemistry, NIS and INSTM Reference Centre, University of Torino, Via G. Quarello 15, 10135 Torino, Italy