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Article dans une revue

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

Abstract :

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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https://hal.univ-angers.fr/hal-03343352
Contributeur : Okina Université d'Angers <>
Soumis le : mardi 14 septembre 2021 - 10:25:27
Dernière modification le : mercredi 15 septembre 2021 - 03:27:17

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Citation

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, American Chemical Society, 2009, 42 (15), pp.5593 - 5599. ⟨10.1021/ma900593u⟩. ⟨hal-03343352⟩

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