1. Institute of Organic Chemistry and Biochemistry AS CR, Flemingovo nám. 2, 166 10 Praha 6, Czech Republic
2. Department
of Organic and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
3. Department
of Physics, University of Colorado, Boulder, Colorado 80309, United States
4. Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States