1. Department of Chemistry, University of Florida, Gainesville, Florida, 32611-7200
2. Department of Chemistry, University of Patras, 265 04 Patras, Greece
3. REQUIMTE and Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugual
4. Centro de Química Estrutural, Instituto Superior Técnico, Technical University of Lisbon, 1049-001 Lisbon, Portugual
5. CICECO and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugual