1. Department of Inorganic Chemistry, Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland, and Department of Biophysics, Faculty of Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland, and Inorganic Chemistry, Chemical Center, Lund University, P.O. Box 124, S-221 00 Lund, Sweden