[1] Acad Sci Czech Republ, Inst Phys, Na Slovance 2, Prague 18221 8, Czech Republic
[2] Inst Phys Chem, Prague 18221 8, Czech Republic
[3] Inst Macromol Chem, Prague 16206 6, Czech Republic
[4] Inst Phys & Theoret Chem, PL-50370 Wroclaw, Poland
[5] Charles Univ Prague, Fac Math & Phys, Dept Chem Phys & Opt, Prague 12116 2, Czech Republic