Early stages of formation of branched host-guest supramolecular polymers (Articolo in rivista)

Type
Label
  • Early stages of formation of branched host-guest supramolecular polymers (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Galantini, L; Jover, A; Leggio, C; Meijide, F; Pavel, NV; Tellini, VHS; Tato, JV; Tortolini, C (2008)
    Early stages of formation of branched host-guest supramolecular polymers
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Galantini, L; Jover, A; Leggio, C; Meijide, F; Pavel, NV; Tellini, VHS; Tato, JV; Tortolini, C (literal)
Pagina inizio
  • 8536 (literal)
Pagina fine
  • 8541 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 112 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Galantini, Luciano; Leggio, Claudia; Pavel, Nicolae Viorel; Tortolini, Cristina] Univ Roma La Sapienza, Dipartimento Chim, I-00185 Rome, Italy; [Galantini, Luciano; Leggio, Claudia; Pavel, Nicolae Viorel] Univ Roma La Sapienza, SOFT INFM CNR, Res Ctr, I-00185 Rome, Italy; [Jover, Aida; Meijide, Francisco; Tellini, Victor Hugo Soto; Tato, Jose Vazquez] Univ Santiago Compostela, Fac Ciencias, Dept Quim Fis, Lugo 27002, Spain (literal)
Titolo
  • Early stages of formation of branched host-guest supramolecular polymers (literal)
Abstract
  • A structural characterization of host-guest supramolecular copolymers, formed by an adamantane dimer and two beta-cyclodextrin trimers in aqueous solution, has been carried out by combining small angle X-ray scattering and light scattering experiments. A shape-reconstruction method was applied to the SAXS data to obtain relatively high-resolution conformation information, and a correlation with the experimental dynamic light scattering results was performed, by estimating the hydrodynamic radii of the reconstructed shape through a shell model method. When applied on the solutions of the trimers, the analysis provides a globular reconstructed shape with a hydrodynamic radius in agreement with the experimental one. For the polymers, elongated structures were inferred which grow both in length and in cross section by increasing the concentration. Depending on the P-cyclodextrin trimer employed in the polymer preparation, polymerization degrees ranging between roughly 7 and 14 or 9 and 22 were obtained in the concentration range 4.00-10.0 or 3.10-6.60 mM of the trimer (6.00-15.0 or 4.65-9.90 mM of the dimer). Aggregation schemes were proposed accounting for the formation of hyperbranched, linear, and network like polymers. The experimental results are not far from those expected on the basis of the aggregation in hyperbranched structure, for which the growth of elongated aggregates can be predicted in the early stages of the polymerization. However, the coexistence of the other structures, in particular of the linear one, cannot be ruled out. (literal)
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