1. Inorganic Chemistry I-Bioinorganic Chemistry; Faculty of Chemistry and Biochemistry; Ruhr-University Bochum; Universitätsstrasse 150 44801 Bochum Germany
2. Department of Chemistry; University of Florence; Via della Lastruccia 3 50019 Sesto Fiorentino Italy
3. Department of Chemistry and Industrial Chemistry (DCCI); University of Pisa; Via Moruzzi 13 56124 Pisa Italy