1. Institute of Physics, University of Szczecin, Wielkopolska 15, 70-451 Szczecin, Poland
2. Laboratory of Theoretical Chemistry, Institute of Chemistry, Faculty of Science, ELTE Eötvös Loránd University, POB 32, H-1518 Budapest, Hungary
3. Hevesy György Ph.D. School of Chemistry, Faculty of Science, ELTE Eötvös Loránd University, POB 32, H-1518 Budapest, Hungary