1. Faculty of Chemistry; Warsaw University of Technology, Noakowskiego 3; 00-664 Warsaw Poland
2. Physics Department; University of Durham, South Road; Durham DH1 3LE UK
3. Faculty of Chemistry; Silesian University of Technology, M. Strzody 9; 44-100 Gliwice Poland
4. Institute of Physical Chemistry; Polish Academy of Science, Kasprzaka 44/52; 01-224 Warsaw Poland