1. Department of Inorganic Chemistry, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic
2. Nuclear Physics Institute of the ASCR, v.v.i., 250 68 Řež, Czech Republic
3. Department of Physics, Faculty of Science, J.E. Purkine University, 400 96 Ústí nad Labem, Czech Republic
4. Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore