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Article Dans Une Revue Macromolecules Année : 2009

Electrogenerated Low Band Gap Polymers Based on the 3-Cyano-4-methoxythiophene Building Block

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1
Noémie Hergué
  • Fonction : Auteur
Charlotte Mallet
  • Fonction : Auteur
Pierre Frère
Magali Allain
Jean Roncali

Résumé

Two position isomers precursors involving 3-cyano-4-methoxythiophene and EDOT (2, 3) have been synthesized. UV−vis and electrochemical data show that the relative position of the methoxy and cyano groups in the structure has dramatic consequences for the reactivity of the precursor and thus for the structure of the resulting polymer. Introduction of the cyano group at the outer β-position of thiophene deactivates the neighboring coupling site, thus leading to the electrodeposition of a material with limited conjugation length. In contrast, when grafted at the inner β-position, the cyano group exerts a stronger effect on the energy gap while the presence of the external methoxy group leads to the straightforward electrodeposition of a low band gap polymer with broad absorption band.

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Chimie
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Dates et versions

hal-03343352 , version 1 (14-09-2021)

Identifiants

Citer

Noémie Hergué, Charlotte Mallet, Pierre Frère, Magali Allain, Jean Roncali. Electrogenerated Low Band Gap Polymers Based on the 3-Cyano-4-methoxythiophene Building Block. Macromolecules, 2009, 42 (15), pp.5593 - 5599. ⟨10.1021/ma900593u⟩. ⟨hal-03343352⟩
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