1. Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
2. Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ 532 10 Pardubice, Czech Republic
3. Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ 532 10 Pardubice, Czech Republic
4. University of Hradec Králové, Faculty of Science, Rotkitanského 62, CZ-500 03 Hradec Králové 3, Czech Republic
5. Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany