1. IFM-Department of Chemistry, Linköping University, S-581 83 Linköping, Sweden, Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia, Department of Inorganic and Analytical Chemistry, University of Debrecen, Hungary, and Department of Chemistry, Royal Institute of Technology (KTH), Stockholm, Sweden