1. Section of Inorganic and Analytical Chemistry, Department of Chemistry, University of Ioannina, 45110, Greece, Department of Physics, University of Ioannina, 45110, Greece, Department of Chemistry, University of Cyprus, 1678, Nicosia, Cyprus, Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, and Department of Chemistry, Laboratory of Applied Quantum Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece