1. Department of Chemistry, Babeş-Bolyai University, Str. Arany Janos Nr. 11, Cluj-Napoca RO-400028, Romania
2. Faculty of Physics, Babeş-Bolyai University, Str. Kogalniceanu 1, Cluj-Napoca RO-400084, Romania
3. Raluca Ripan Institute for Research in Chemistry, Babeş-Bolyai University, Fantanele 30, 400294, Cluj-Napoca, Romania