Electrochemical, magnetic, and electrical properties of a,w-capped sexithiohene films. 1. Neutral-polaron and polaron-bipolaron conductivities (Articolo in rivista)

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Label
  • Electrochemical, magnetic, and electrical properties of a,w-capped sexithiohene films. 1. Neutral-polaron and polaron-bipolaron conductivities (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/cm051798u (literal)
Alternative label
  • Zotti G.; Zecchin S.; Vercelli B.; Berlin A.; Grimoldi S.; Pasini M.C.; Raposo M.M.M. (2005)
    Electrochemical, magnetic, and electrical properties of a,w-capped sexithiohene films. 1. Neutral-polaron and polaron-bipolaron conductivities
    in Chemistry of materials
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Zotti G.; Zecchin S.; Vercelli B.; Berlin A.; Grimoldi S.; Pasini M.C.; Raposo M.M.M. (literal)
Pagina inizio
  • 6492 (literal)
Pagina fine
  • 6502 (literal)
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  • http://pubs.acs.org (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 17 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 25 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-IENI; CNR-ISTM; CNR-ISMAC; Department of Chemistry, UniVersity of Minho, Portugal (literal)
Titolo
  • Electrochemical, magnetic, and electrical properties of a,w-capped sexithiohene films. 1. Neutral-polaron and polaron-bipolaron conductivities (literal)
Abstract
  • Thin solid films of 14 sexithiophenes variously substituted at the terminal R,?-positions were electrochemically deposited on electrodes by anodic coupling of the corresponding half-capped terthiophenes. Sexithiophene films were investigated by cyclic voltammetry, EQCM, in situ ESR, and in situ conductivity. Reversible oxidation is composed by two separate one-electron steps, the first of which is split into two 0.5-electron steps for most 3,4-ethylenedioxy-substituted terthiophenes. ESR indicates strong magnetic dimerization for the one-electron oxidized species. Conductivity (in the range 10-4- 10-1 S cm-1) is redox type and develops at the neutral-cation (neutral-polaron) and cation-dication (polaron-bipolaron) levels with values 5-10 times higher for the latter. The influence of steric, electron donor-acceptor, and conjugative effects on conductivity was evaluated by a suitable choice of endcapping substituents. (literal)
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