Normal Vibrational Analysis of the Syndiotactic Polystyrene s(2/1)2 Helix (Articolo in rivista)

Type
Label
  • Normal Vibrational Analysis of the Syndiotactic Polystyrene s(2/1)2 Helix (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/jp809043w (literal)
Alternative label
  • F. Javier Torres, B. Civalleri, A. Meyer, P. Musto, A.R. Albunia, P. Rizzo, G. Guerra (2009)
    Normal Vibrational Analysis of the Syndiotactic Polystyrene s(2/1)2 Helix
    in The journal of physical chemistry. B
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • F. Javier Torres, B. Civalleri, A. Meyer, P. Musto, A.R. Albunia, P. Rizzo, G. Guerra (literal)
Pagina inizio
  • 5059 (literal)
Pagina fine
  • 5071 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 113 (literal)
Rivista
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Universitá di Salerno Dipartimento di Chimica and INSTM Research Unit - Università di Salerno; (3) Institute of Chemistry and Technology of Polymers (ICTP) - National Research Council of Italy; (5) Dipartimento di Chimica IFM and NIS - Centre of Excellence Università di Torino; (6) Dipartimento di Fisica, Università di Roma \"La Sapienza\" - P.le Aldo Moro 5, 00185 Roma, Italy, Present address: Dipartimento di Fisica Generale, Università di Torino - Via Giuria 1, 10125 Torino, Italy; (7) Colegio de Ciencias e Ingeniería - El Politécnico - Universidad San Francisco De Quito (literal)
Titolo
  • Normal Vibrational Analysis of the Syndiotactic Polystyrene s(2/1)2 Helix (literal)
Abstract
  • The full vibrational spectra of the gamma, delta, and epsilon crystalline phases of syndiotactic polystyrene (sPS), i.e., phases presenting the s(2/1)2 helical conformation, have been experimentally determined and compared with that calculated at the B3LYP/6-31G(d,p) level of theory for an infinite helix. The assignment of the different modes was highly facilitated and validated by the experimental evaluation of the direction of the transition moment vector of most IR peaks, which was made possible for the first time by measurements on sPS films with different uniplanar orientations of the crystalline phase. The normal vibration analysis of most representative modes of the periodic model allowed for a general description of each one to be obtained, which was further confirmed by the direct inspection of mode animations. (literal)
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