1. Department of Chemical Sciences
2. University of Naples “Federico II”
3. I-80126 Naples
4. Italy
5. CNR-SPIN and Department of Physics
6. University of Naples Federico II
7. Naples 80125
8. Department of Molecular medicine and Medical Biotechnology
9. 80145 Naples
10. CNR
11. Istituto di Ricerche sulla Combustione
12. Naples