1. Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Sienkiewicza 112, Poland, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Universita de Chimica Fisica et Inorganica, Universita degli Studi di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy, and Institute of Technical Biochemistry, Technical University of Łódź, 90-924 Łódź, Stefanowskiego 4/10, Poland