1. Institute of Chemistry, Academy of Sciences of Moldova, Academiei str. 3 MD-2028 Chisinau, Moldova
2. Laboratoire de Chimie Inorganique et Bioinorganique, Ecole Polytechnique Fédérale de Lausanne, Switzerland
3. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, D-76131, Karlsruhe, Germany
4. Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany