1. Section of Inorganic and Analytical Chemistry, Section of Physical Chemistry, Department of Chemistry, and Physics of Material Laboratory, Department of Physics, University of Ioannina, 45110 Ioannina, Greece, Department of Chemistry, A. Mickiewicz University, ul. Grunwaldzka 6, 60-780 Poznan, Poland, and Department of Chemistry, McGill University, 801 Sherbrooke, Montreal, Quebec, Canada H2A 2K6