- Lattice Dynamics of Oligo(phenylenethienylene)s: A Far-Infrared and Inelastic Neutron Scattering Study doi link

Auteur(s): Hermet P.(Corresp.), Lois-Sierra Sandrine, Bantignies J.-L., Rols Stéphane, Sauvajol J.-L., Serein Françoise, Lère-Porte Jean-Pierre, Moreau Joël J. E.

(Article) Publié: The Journal Of Physical Chemistry B, vol. 113 p.4197-4202 (2009)

Ref HAL: hal-00394444_v1
PMID 19254013
DOI: 10.1021/jp808652c
WoS: 000264591800027
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New promising oligo(phenylenethienylene)s have been synthesized to realize suitable materials for improving electronic transport properties, particularly in organic field effect transistors (OFETs). Far-infrared and incoherent neutron scattering measurements have been performed to assign their phonon modes. The assignment of the main low-frequency phonon modes of these materials has been performed experimentally by using a filiation procedure. Assuming a small frequency dispersion of the high-frequency modes, the main intramolecular phonon modes of a model oligomer have been assigned by using first-principles calculations on its isolated molecule. These assignments constitute the preliminary work for a better understanding of these new promising materials in electronic and opto-electronics applications.