1. Dipartimento di Scienze e Tecnologie Chimiche, Università “Tor Vergata”, Via della Ricerca Scientifica, 1, I-00133 Rome, Italy
2. Department of Chemistry, The University of British Columbia, 3247 University Way, Kelowna, British Columbia, Canada, V1V 1V7
3. Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States