1. College of Physics Hebei Normal University Shijiazhuang 050024 China
2. Center of Materials and Nanotechnologies Faculty of Chemical Technology University of Pardubice Nam. Cs. Legii 565 Pardubice 530 02 Czech Republic
3. Joint Laboratory of Solid State Chemistry University of Pardubice Studentska 84 Pardubice 532 10 Czech Republic
4. Department of Inorganic Chemistry Faculty of Natural Sciences Comenius University in Bratislava Ilkovicova 6 – Mlynska dolina Bratislava 842 15 Slovak
5. Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentska 573 Pardubice 532 10 Czech Republic