title: Lattice dynamics of oligo(phenylenethienylene)s: a far-infrared and inelastic neutron scattering study.
abstract: 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.
authors.affiliation: Laboratoire de Physique du Solide, Facultes Universitaires Notre-Dame de la Paix, Namur, Belgium.
authors.forename: P
authors.initials: P
authors.lastname: Hermet
authors.forename: S
authors.initials: S
authors.lastname: Lois-Sierra
authors.forename: J-L
authors.initials: JL
authors.lastname: Bantignies
authors.forename: S
authors.initials: S
authors.lastname: Rols
authors.forename: J-L
authors.initials: JL
authors.lastname: Sauvajol
authors.forename: F
authors.initials: F
authors.lastname: Serein-Spirau
authors.forename: J-P
authors.initials: JP
authors.lastname: Lère-Porte
authors.forename: J J E
authors.initials: JJ
authors.lastname: Moreau