1. Department of Chemistry, Josip Juraj Strossmayer University Osijek, HR-31000 Osijek, Croatia
2. Department of Chemistry, Faculty of Science, University of Zagreb, HR-10000 Zagreb, Croatia
3. Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia
4. University Center Varaždin, University North, HR-42000 Varaždin, Croatia