期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 15, 页码 8198-8202出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202015219
关键词
ferroelastics; polarization switching; regulation; solvent effect
资金
- National Natural Science Foundation of China [21991141]
- Natural Science Foundation of Zhejiang Province [LZ20B010001]
- Zhejiang Normal University
This study reveals the unprecedented ability to regulate the transition from ferroelasticity to ferroelectricity in organic ferroelectrics through solvent selective effect, highlighting the important role of solvent effect in organic ferroelectrics.
Organic ferroelectrics are highly desirable for their light weight, mechanical flexibility and biocompatibility. However, the rational design of organic ferroelectrics has always faced great challenges. Anilinium bromide (AB) has two structures reported in the Cambridge Crystallographic Data Centre, which might be an mmmF2/m type ferroelastic (AB-1). When we studied its ferroelasticity, we were surprised to discover that there was another crystal (AB-2) in H2O besides this one, and they were very difficult to separate. By changing the solvent, we found that AB-1 crystals could be formed in ethanol, where ferroelastic domains were visualized by polarized light microscopy, and AB-2 crystals could be obtained from various crystallization solvents of methanol, isopropanol, N-butanol, acetonitrile, dimethyl sulfoxide, and N,N-dimethylformamide, which undergo a ferroelectric phase transition with mm2Fm, showing clear ferroelectricity in two phases. To our knowledge, the regulation of ferroelasticity to ferroelectricity by solvent selective effect is unprecedented in the field of ferroelectrics. This work reveals the important role of solvent effect in organic ferroelectrics.
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