1. Inorganic Chemistry II; Ruhr-University Bochum; 44870 Bochum Germany
2. Chair of Inorganic and Metal-Organic Chemistry; Department of Chemistry and Catalysis Research Centre; Technical University of Munich; Garching 85787 Germany
3. Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
4. Regional Centre of Advanced Technologies and Materials; Faculty of Science; Palacky University; Šlechtitelu˚ 27 783 71 Olomouc Czech Republic