1. Dipartimento di Chimica and NIS (Nanostructured Interfaces and Surfaces) Centre, Università di Torino, via Giuria 5, I-10125 Torino, Italy
2. Institute for Physical and Theoretical Chemistry, Universität Regensburg, Universitätsstrasse 31, D-93040 Regensburg, Germany
3. Sorbonne Universités, UPMC Univ. Paris 06, UMR 7616, Laboratoire de Chimie Théorique, F-75005 Paris, France
4. CNRS, UMR 7616, Laboratoire de Chimie Théorique, F-75005 Paris, France
5. Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA