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- Correlations between structure and far-infrared active modes in polythiophenes doi link

Auteur(s): Hermet P.(Corresp.), Bantignies J.-L., Almairac Robert, Sauvajol J.-L., Lère-Porte Jean-Pierre, Serein Françoise

(Article) Publié: Journal Of Physics B: Atomic, Molecular And Optical Physics, vol. 112 p.12662-12665 (2008)
Texte intégral en Openaccess : istex


Ref HAL: hal-00355391_v1
PMID 18774846
DOI: 10.1021/jp804813p
WoS: 000259780200015
Exporter : BibTex | endNote
9 Citations
Résumé:

We have investigated the experimental x-ray and far-infrared responses of three polythiophenes synthesized from a thiophene, alpha-bithiophene and alpha-quaterthiophene monomer. The x-ray data show that the crystallinity of the different polythiophene samples depends on the synthesis conditions. An excellent correlation between the crystallinity of polythiophenes and their far-infrared signatures is demonstrated. In addition, the assignment of the far-infrared phonon modes in polythiophenes is given by a direct comparison with its oligomers. In particular, the ring libration inside the polymeric chain, directly involved in the electron-phonon coupling, is assigned.