title: Novel non-covalent stable supramolecular ternary system comprising of cyclodextrin and branched polyethylenimine.
abstract: The synthesis of a novel supramolecular system comprising of branched polyethylenimine and cyclodextrin, is presented. The synthesis route is based on the self-assembly phenomena with the inclusion of solvent molecules. The systems are formed by a hydrogen-bonding network and host-guest type interactions between the building blocks. It was found that the native cyclodextrin and polyethylenimine are able to form stable systems when the reaction medium constitutes a polar solvent forming host-guest type complexes with cyclodextrin. A special consideration was paid on the detailed spectroscopic analyses of the obtained water-soluble constructs, including ROESY and diffusion-ordered (DOSY) NMR spectroscopy studies. The versatility and significance of DOSY technique for the analysis of the cyclodextrin complexes and its non-covalent systems with branched polymers, were presented. It was also found that the guest molecules that were incorporated in the complexes exhibited enhanced thermal stability. The morphological details in the solid state were obtained by scanning electron microscope.
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland.
authors.forename: Artur
authors.initials: A
authors.lastname: Kasprzak
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Poplawska
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland.
authors.forename: Hanna
authors.initials: H
authors.lastname: Krawczyk
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland.
authors.forename: Sergey
authors.initials: S
authors.lastname: Molchanov
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland.
authors.forename: Mikolaj
authors.initials: M
authors.lastname: Kozlowski
authors.affiliation: Department of Chemistry, University of Warsaw, 02-093 Warsaw, Poland.
authors.forename: Michal
authors.initials: M
authors.lastname: Bystrzejewski
keywords: Cyclodextrin; Polyethylenimine; Spectroscopy; Supramolecular chemistry