1. Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
2. CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
3. Supramolecular Chemistry Group, Institute of Molecular Sciences, University of Valencia, 46980 Paterna, Spain
4. ICCOM-CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy