1. ISTM-CNR and INSTM - Padova University, Department of Chemistry, 35131 Padova, Italy
2. Ruhr-University Bochum, Inorganic Materials Chemistry - Lehrstuhl für Anorganische Chemie II, D-44780 Bochum, Germany
3. Padova University and INSTM, Department of Chemistry, 35131 Padova, Italy