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Article Dans Une Revue Journal of Organic Chemistry Année : 2009

Quaterthiophenes with Terminal Indeno[1,2-b]thiophene Units as p-Type Organic Semiconductors

Laurent Pouchain
  • Fonction : Auteur
Olivier Alévêque
Yohann Nicolas
  • Fonction : Auteur
Agathe Oger
  • Fonction : Auteur
Charles-Henri Le Régent
  • Fonction : Auteur
Magali Allain
Philippe Blanchard
Jean Roncali

Résumé

Quaterthiophenes 4T, Oct-4T, and Tol-4T based on a central 2,2′-bithiophene core α,ω-terminated with 4,4-unsubstituted and 4,4-disubstituted n-octyl or p-tolyl indeno[1,2-b]thiophene have been synthesized by Stille or Miyaura−Suzuki couplings. Compound 4T was also synthesized by an alternative route involving a soluble precursor bearing solubilizing trimethylsilyl groups which have been eliminated in the last step. The electronic properties of the compounds have been analyzed by cyclic voltammetry, UV−vis absorption and fluorescence emission spectroscopy. Thermal evaporation of 4T and Oct-4T leads to crystalline thin films and UV−vis absorption and X-ray diffraction data for these films suggest that the molecules adopt a quasi-vertical orientation onto the substrate. Strong π-π intermolecular interactions have been observed for 4T but not for molecules Oct-4T due to the presence of n-octyl chains. Sublimed thin films of Tol-4T show an amorphous character. The characterization of field-effect transistors fabricated from these three materials gave a hole-mobility of 2.2 × 10−2 cm2 V−1 s−1 with an on/off ratio of 2.2 × 104 for 4T while no field-effect was observed for Oct-4T and Tol-4T.

Domaines

Chimie
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Dates et versions

hal-03343391 , version 1 (14-09-2021)

Identifiants

Citer

Laurent Pouchain, Olivier Alévêque, Yohann Nicolas, Agathe Oger, Charles-Henri Le Régent, et al.. Quaterthiophenes with Terminal Indeno[1,2-b]thiophene Units as p-Type Organic Semiconductors. Journal of Organic Chemistry, 2009, 74 (3), pp.1054 - 1064. ⟨10.1021/jo802028n⟩. ⟨hal-03343391⟩
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