1. Department
of Physics, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russian Federation
2. Department
of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland
3. Institute
of Chemistry, University of Bialystok, Ciolkowskiego 1K, 15-245 Bialystok, Poland