1. Faculty of Chemistry, Jagiellonian University in Krakow, Gronostajowa 2, 30-387 Krakow, Poland
2. Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
3. J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejskova 3, 18223 Prague, Czech Republic
4. Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nam. 542/2, CZ-16000 Prague 6, Czech Republic