1. Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
2. Neutron Spectroscopy Department, Centre for Energy Research, Konkoly-Thege Miklós út 29-33, Budapest H-1121, Hungary
3. Department of Inorganic and Analytical Chemistry, MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group, University of Debrecen, Egyetem tér 1, Debrecen H-4032, Hungary