1. Department
of Chemistry, St. Petersburg State University, Universitetsky
Pr. 26, 198504 Stary Petergof, Russian Federation
2. Department of Chemistry, University of Eastern Finland, P.O.
Box 111, FI-80101 Joensuu, Finland
3. Institute of Macromolecular Compounds of Russian Academy of Sciences, V.O. Bolshoii
Pr. 31, 199004 St. Petersburg, Russian Federation