1. CHOSE – Centre for Hybrid and Organic Solar Energy Department of Electronic Engineering University of Rome “Tor Vergata” 00133 Rome Italy
2. Institute of Chemistry of Organometallic Compounds (CNR-ICCOM) 50019 Sesto Fiorentino Italy
3. Department of Chemistry “U. Schiff” University of Florence 50019 Sesto Fiorentino Italy
4. Institute of Structure of Matter (CNR-ISM) 00133 Rome Italy