1. Faculty of Physics and Mathematics, Ilia Chavchavadze State University, Chavchavadze Av. 32,Tbilisi 0157, Georgia, Faculty of Exact and Natural Sciences, Institute of Physics, Tbilisi State University, Chavchavadze Av. 3, Tbilisi 0128, Georgia, and Faculty of General Chemistry, N. Copernicus University, Gagarin 7, Torun 87-100, Poland