1. J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
2. L.V. Pisarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine, pr. Nauky 31, 03037 Kyiv, Ukraine
3. Faculty of Natural Sciences, Charles University, Albertov 2030, 128 40 Prague 2, Czech Republic