1. Dipartimento di Chimica ‘Ugo Schiff’
2. Università degli Studi di Firenze
3. 50019 Sesto Fiorentino (FI)
4. Italy
5. European Laboratory for Non-Linear Spectroscopy
6. Institute of Organic Chemistry and Biochemistry
7. Academy of Sciences of the Czech Republic
8. 166 10 Prague 6
9. Czech Republic