1. National Institute of Chemical Physics and Biophysics; Akadeemia tee 23 12618 Tallinn Estonia
2. Theoretical and Structural Chemistry Group; Department of Physical Chemistry; Faculty of Chemistry; University of Lodz; Pomorska 163/165 90-236 Łódź Poland
3. Current address: Department of Biochemistry and Biophysics; Arrhenius Laboratories; Stockholm University; Svante Arrhenius väg 16 10691 Stockholm Sweden
4. Department of Chemistry and Biotechnology; Tallinn University of Technology; Akadeemia tee 15 12618 Tallinn Estonia