1. Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Husinec-Řež, Czech Republic
2. Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
3. Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Praha, Czech Republic