1. Department of Polygraphic Science Faculty of Chemical Technology 532 10 Pardubice Czech Republic
2. Department of Organic Chemistry Faculty of Chemical Technology University of Pardubice 532 10 Pardubice Czech Republic
3. Department of General and Inorganic Chemistry Faculty of Chemical Technology 532 10 Pardubice Czech Republic
4. Institute of Inorganic Chemistry RWTH Aachen University 52074 Aachen Germany