1. Faculty of Chemistry; University of Wrocław; ul. F. Joliot-Curie 14 50-383 Wrocław Poland
2. Faculty of Chemistry; A. Mickiewicz University; Umultowska 89B 61-614 Poznań Poland
3. Institute of Physics; West Pomeranian University of Technology Szczecin; Al. Piastów 17 70-310 Szczecin Poland