1. Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, 1001 Ljubljana, Slovenia
2. National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
3. Texas A&M University at Galveston, 5007 Avenue U, Galveston, Texas 77551, and Visiting Scientist at the Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, 1001 Ljubljana, Slovenia