Electrochemical synthesis and characterization of a copolymer made from the 2-biphenyl-3-octylthiophene monomer

Rose-Marie Latonen*, Jan-Erik Lönnqvist, Lars Jalander, Kaj Fröberg, Carita Kvarnström, Ari Ivaska

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

4 Citeringar (Scopus)


An electrically conducting copolymer film synthesized by electrochemical polymerization from a comonomer molecule of 2-biphenyl-3-
octylthiophene (BOT) was studied. A poly(2-biphenyl-3-octylthiophene) (PBOT) film adherent on a Pt working electrode was polymerized by
potential cycling of 40mM BOT in 0.1M lithium hexafluoro arsenate (LiAsF6)-acetonitrile electrolyte solution. Many soluble intermediates were
formed in the polymerization process. The effect of the concentration of the starting material, type of the electrolyte salt, the solvent and the scan
rate used in polymerization and temperature was studied on the polymerization process of BOT. The formed PBOT film was characterized by cyclic
voltammetry (CV), X-ray diffraction (XRD) analysis and electron ionization mass spectrometric (EIMS) analysis. The properties of the formed
copolymer was compared with a copolymer synthesized using biphenyl and 3-octylthiophene as starting materials, poly(thienyl biphenyl) (PTB).
The CV and EIMS measurements gave evidence of formation of a conductive material with a shorter effective conjugation length than in the PTB
copolymer. XRD measurements showed that a semi-crystalline and rather amorphous structure was obtained in both electrochemically synthesized
copolymers. But the structure of PBOT, however, was found to be according to the shape of the cyclic voltammogram and from EIMS and XRD
data less cross-linked and more uniform than the structure of PTB.
Sidor (från-till)878–884
TidskriftSynthetic Metals
StatusPublicerad - 2006
MoE-publikationstypA1 Tidskriftsartikel-refererad


  • Conducting polymer; Copolymer; Cyclic voltammetry; XRD analysis; MS analysis

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