1. Department of Chemistry, University of Rome “La Sapienza”, Rome, Italy, Department of Biotechnology, Norwegian University of Science and Technology, Trondheim, Norway, Institute of Chemical Methodologies, CNR, Research Area of Rome, 00016 Monterotondo Staz., Rome, Italy, and Department of S.T.A.A.M., University of Molise, 86100 Campobasso, Italy