1. Faculty of Chemistry and Chemical Engineering, “Babes-Bolyai” University, 400084 Cluj, Romania, The R. Bošković Institute, P.O. Box 180, HR-10002 Zagreb, Croatia, Faculty of Natural Sciences, Mathematics and Education, Nikole Tesle 12, HR-21000 Split, Croatia, and National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia