1. Dipartimento di Chimica, Università della Basilicata, Via N. Sauro 85, 85100 Potenza, Italy, Afdeling Theoretische Chemie, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Center for Photochemical Sciences and Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, Department of Chemistry, Faculty of Science, Ehime University, Matsuyama 790 8577, Japan