Polyvinyl-locked vs free quaterthiophene: effect of spatial constraints on the electronic properties of n-hexyl-quaterthiophene (Articolo in rivista)

Type
Label
  • Polyvinyl-locked vs free quaterthiophene: effect of spatial constraints on the electronic properties of n-hexyl-quaterthiophene (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/cphc.200700459 (literal)
Alternative label
  • M. Melucci, M. Zambianchi, A. Zanelli, N. Camaioni, M. Gazzano, A. Bongini, G. Barbarella (2007)
    Polyvinyl-locked vs free quaterthiophene: effect of spatial constraints on the electronic properties of n-hexyl-quaterthiophene
    in ChemPhysChem (Print); Wiley-VCH Verlag, GmbH., Weinheim (Germania)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Melucci, M. Zambianchi, A. Zanelli, N. Camaioni, M. Gazzano, A. Bongini, G. Barbarella (literal)
Pagina inizio
  • 2621 (literal)
Pagina fine
  • 2626 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 8 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • in press (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto CNR-ISOF Dipartimento di Chimica - Università di Bologna (literal)
Titolo
  • Polyvinyl-locked vs free quaterthiophene: effect of spatial constraints on the electronic properties of n-hexyl-quaterthiophene (literal)
Abstract
  • A soluble, low-weight fraction of poly(a-vinyl, omega-n -hexyl-quaterthiophene), PT4Hex, having n-hexylquaterthiophenes as side-chain groups, is prepared by free-radical polymerization of a-vinyl omega-n-hexyl-quaterthiophene and the corresponding properties compared to those of free di-n-hexylquaterthiophene (T4Hex). Optical analysis (absorption and emission) and X-ray diffraction data indicate that in the polyvinyl-locked architecture the quaterthiophene pendants adopt a cofacial arrangement with a mutual distance close enough for pi-pi orbitals to overlap (similar to 4 angstrom). As a consequence of the close chain packing, a shift of the reduction potential of about 0.5 V toward less negative values with respect to free T4Hex, is found for PT4Hex films. Due to its enhanced electron affinity, PT4Hex displays an electron-acceptor behavior when blended with alkylated and silylated quaterthiophenes acting as donors. (literal)
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