1. Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ontario K1N 6N5, Canada
2. National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
3. Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
4. NMR Research Unit, University of Oulu, P.O. Box 300, 90014 Oulu, Finland
5. Department of Chemistry, Nanoscience Centre, University of Jyväskylä, P.O. Box 35, FI-40014, Finland