Premium
Dipole‐Switchable Poly( para ‐phenyleneethynylene)s: Ferroelectric Conjugated Polymers
Author(s) -
Kushida Soh,
Smarsly Emanuel,
Bojanowski N. Maximilian,
Wacker Irene,
Schröder Rasmus R.,
Oki Osamu,
Yamamoto Yohei,
Melzer Christian,
Bunz Uwe H. F.
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201808827
Subject(s) - ferroelectricity , conjugated system , stacking , polymer , dipole , materials science , side chain , benzene , ring (chemistry) , polymer chemistry , optoelectronics , chemistry , organic chemistry , composite material , dielectric
Dipolar 2,3‐difluorobenzene units are introduced into the backbone of a poly( para ‐phenyleneethynylene) (PPE) to generate a ferroelectric conjugated polymer. The structural features of the partially fluorinated PPE allow for the generation of a remanent polarization in the solid state; the difluorinated benzene rings behave as molecular rotors at high temperature, while at room temperature, stacking of such rings clamps down the ring orientation. The molecular dipoles can still be oriented by moderate external electrical fields at room temperature, and this PPE is then ferroelectric. The concept should be transferable to other poly(aryleneethynylene)s, and novel conjugated ferroelectric conjugated polymers will be accessible using this concept.