Raman Spectra of Poly(p-phenylenevinylene)s with Fluorinated Vinylene Units: Evidence of Inter-ring Distortion (Articolo in rivista)

Type
Label
  • Raman Spectra of Poly(p-phenylenevinylene)s with Fluorinated Vinylene Units: Evidence of Inter-ring Distortion (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Piacenza M., Comoretto D., Burger M., Morandi V., Marabelli F., Martinelli C., Farinola G.M., Cardone A., Gigli G., Della Sala F. (2009)
    Raman Spectra of Poly(p-phenylenevinylene)s with Fluorinated Vinylene Units: Evidence of Inter-ring Distortion
    in ChemPhysChem (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Piacenza M., Comoretto D., Burger M., Morandi V., Marabelli F., Martinelli C., Farinola G.M., Cardone A., Gigli G., Della Sala F. (literal)
Pagina inizio
  • 1284 (literal)
Pagina fine
  • 1290 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 10 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • National Nanotechnology Laboratory (NNL) of CNR-INFM, Università del Salento, Via per Arnesano, 73100 Lecce (Italy), Fax: (+39) 0832-298238 Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova (Italy), Fax: (+39) 010-3538733 Physics Department \"A. Volta\", Università di Pavia, Via Bassi 6, 27100 Pavia (Italy) Dipartimento di Chimica, Università di Bari, Via Orabona 4, 70126 Bari (Italy) CNR ICCOM Istituto di Chimica dei Composti Organometallici, Università di Bari, Via Orabona 4, 70126 Bari (Italy) (literal)
Titolo
  • Raman Spectra of Poly(p-phenylenevinylene)s with Fluorinated Vinylene Units: Evidence of Inter-ring Distortion (literal)
Abstract
  • The Raman spectrum of poly{2-methoxy-5-[(2-ethylhexyl)oxy]- 1,4-phenylenedifluorovinylene} (MEH-PPDFV) is reported and compared with that of a well-known non-fluorinated reference polymer, namely poly{2-methoxy-5-[(2-ethylhexyl)oxy]-1,4-phenylenevinylene} (MEH-PPV). The Raman spectra of both polymers are assigned on the basis of density functional theory calculations of the corresponding oligomers. The main differences between vinylene fluorinated and non-fluorinated structures deal with the intensity, frequency shift and broadening of C?C vinylene stretching. Additional differences concern the relative intensities of C?C phenylene and vinylene stretching as well as the deformation modes in the range 1250-1350 cm?1. It is shown that these effects are due to the larger distortion from planarity of the fluorinated polymer, compared with the nonfluorinated counterpart, induced by repulsive interactions between the fluorine atoms on the vinylene units and the oxygen atoms of the alkoxy groups on the aromatic rings. (literal)
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