1. Faculty of Chemistry, Biological and Chemical Research CentreUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
2. Centre of New TechnologiesUniversity of Warsaw Banacha 2 C 02-097 Warsaw Poland
3. NMR Research UnitUniversity of Oulu 90014 Oulu Finland
4. Institute of Physical ChemistryPolish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland