1. Department of Inorganic Chemistry, Gdańsk University of Technology, Narutowicza St. 11/12, 80‐233, Gdańsk, Poland, Fax: +48‐58 347 26 94
2. Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
3. Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza St. 11/12. 80‐233, Gdańsk, Poland