1. a Department of Inorganic and Physical Chemistry , Palacký University , Kři´žkovského 10, Olomouc , 771 47 , Czech Republic
2. b Department of Environmental Inorganic Chemistry , Chalmers University of Technology , Göteborg , SE-41296 , Sweden
3. c Faculty of Chemistry , Nicholas Copernicus University , Gagarina 7, Toruń , 87-100 , Poland