Processing, thermal stability and morphology of chiral sensing syndiotactic polystyrene films (Articolo in rivista)

Type
Label
  • Processing, thermal stability and morphology of chiral sensing syndiotactic polystyrene films (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/b715269h (literal)
Alternative label
  • Guadagno, L (Guadagno, Liberata)1; Raimondo, M (Raimondo, Marialuigia)1; Silvestre, C (Silvestre, Clara)2; Immediata, I (Immediata, Ivano)3; Rizzo, P (Rizzo, Paola)3; Guerra, G (Guerra, Gaetano)3 (2008)
    Processing, thermal stability and morphology of chiral sensing syndiotactic polystyrene films
    in Journal of materials chemistry (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Guadagno, L (Guadagno, Liberata)1; Raimondo, M (Raimondo, Marialuigia)1; Silvestre, C (Silvestre, Clara)2; Immediata, I (Immediata, Ivano)3; Rizzo, P (Rizzo, Paola)3; Guerra, G (Guerra, Gaetano)3 (literal)
Pagina inizio
  • 567 (literal)
Pagina fine
  • 572 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.rsc.org/en/Content/ArticleLanding/2008/JM/b715269h (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 18 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Univ Salerno, Dipartimento Ingn Chim & Alimentare, I-84084 Salerno, Italy 2. Natl Res Council Italy, ICTP, I-80078 Naples, Italy 3. Univ Salerno, Dipartimento Chim, I-84084 Salerno, Italy (literal)
Titolo
  • Processing, thermal stability and morphology of chiral sensing syndiotactic polystyrene films (literal)
Abstract
  • Processing conditions for the specific delta-form syndiotactic polystyrene (s-PS) films, being suitable to detect amplify and memorize the chirality of several volatile non-racemic organic guests, have been investigated. The occurrence of induced circular dichroism (ICD) phenomena is critically dependent not only on the presence of the nanoporous delta phase but also on the solvent and process used for the film preparation. The dependence of the ICD phenomena on the guest enantiomeric excess has also been studied. The observed ICD phenomena, and hence the memory of the non-racemic guest molecules, remain stable not only after chiral-guest removal but also after thermal treatments up to the polymer melting temperature (approximate to 270 degrees C). In particular, the maintenance of intense ICD phenomena also after the thermal transition toward the trans-planar alpha crystalline phase indicates that the chiral memory is not associated with some molecular structure but with the formation of non-racemic supramolecular structures. These supramolecular structures could be possibly associated with the large rod-like crystallites observed only for delta-form s-PS chiral-sensing films (by atomic force microscopy). In fact, these crystallites are clearly re-crystallized, as a consequence of guest sorption, and then remain essentially unaltered for thermal treatments, at least up to 240 degrees C. (literal)
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