1. Department
of Chemistry, University of Perugia, Via
Elce di sotto n. 8. 06123
Perugia, Italy
2. ICCOM-CNR, Area di Ricerca CNR,
Firenze, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
3. Department
of Chemistry and
Industrial Chemistry, University of Pisa, Via Risorgimento 35 - 56126 Pisa, Italy