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- Publisher
- Wiley
- Copyright
- © 2022 SIOC, CAS, Shanghai, & WILEY‐VCH GmbH
- eISSN
- 1614-7065
- DOI
- 10.1002/cjoc.202200297
- Publisher site
- See Article on Publisher Site
Abstract
Recently, molecular ferroelectrics have attracted more and more attention due to their structural diversity, low cost of manufacture, and environmental‐friendly processing. However, most of the design strategies for molecular ferroelectrics have focused on the selection and modification of cations, and the use of anions has been rarely reported. Here, introducing distorted [CuBr4]2– tetrahedra, we obtained a high curie temperature (Tc) ferroelectric, [cyclopentylammonium]2CuBr4, with a Tc as high as 393 K, and exceeding commercial and most of reported molecular ferroelectric BaTiO3 (393 K). Variable‐temperature hysteresis loop shows the nonlinear P‐E loop of the crystal under a wide temperature range. Variable‐temperature single‐crystal X‐ray diffraction revealed that the Aizu expression can be written as mmmFmm2. In short, this work will inspire more creative strategies by exploiting the tunability of the anion module.
Journal
Chinese Journal of Chemistry – Wiley
Published: Sep 15, 2022
Keywords: Molecular ferroelastic; Anions; Design strategy; Organic‐inorganic hybrid composites; Phase transitions