1. J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague, Czech Republic, Institute of Biophysics, Academy of Sciences of the Czech Republic, Královopolská 135, 612 65 Brno, Czech Republic, Department of Chemistry and Computational Center for Molecular Structure and Interactions, Jackson State University, Jackson, Mississippi 39217, and Department of Chemistry, University of Dortmund, 44221 Dortmund, Germany