An unprecedented azobenzene-based organic single-component ferroelectric† † Electronic supplementary information (ESI) available. CCDC 2144165 and 2144166. For ESI and crystallographic data in CIF or other electronic format see https://doi.org/10.1039/d2sc00689h

ABSTRACT: Organic single-component ferroelectrics, as an important class of metal-free ferroelectrics, are highly desirable because of their easy processing, mechanical flexibility, and biocompatibility. However, although nearly 50 years have passed since the discovery of photochromism in azobenzene-doped cholesteric liquid crystals, ferroelectricity has never been found in azobenzene-based crystals. Here, we use an amino group to substitute a fluorine atom of 2,2′,4,4′,6,6′-hexafluoroazobenzene, which successfully introduces ferroelectricity into 2-amino-2′,4,4′,6,6′-pentafluoroazobenzene (APFA). APFA shows an extremely high Curie temperature (Tc) of 443 K, which is outstanding among single-component ferroelectrics. It also exhibits an indirect optical band gap of 2.27 eV as well as photoisomerizat

SUBMITTER: Peng H 

PROVIDER: S-EPMC9067575 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature