1. Research Institute for Physical Chemical Problems of Belarusian State University, Leningradskaya 14, 220006 Minsk, Belarus
2. Institute
of Inorganic Chemistry, University of Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
3. Belarusian State University, Nezalezhnastsi
Avenue 4, 220050 Minsk, Belarus