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A Molecular Thermochromic Ferroelectric
Author(s) -
Liu JunChao,
Liao WeiQiang,
Li PengFei,
Tang YuanYuan,
Chen XiaoGang,
Song XianJiang,
Zhang HanYue,
Zhang Yi,
You YuMeng,
Xiong RenGen
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201914193
Subject(s) - ferroelectricity , thermochromism , dabco , materials science , dielectric , phase transition , nanotechnology , photochromism , smart material , crystallography , chemistry , optoelectronics , condensed matter physics , organic chemistry , octane , physics
Molecular ferroelectrics have attracted considerable interests because of their easy and environmentally friendly processing, low acoustical impedance and mechanical flexibility. Herein, a molecular thermochromic ferroelectric, N,N′‐dimethyl‐1,4‐diazoniabicyclo[2.2.2]octonium tetrachlorocuprate(II) ([DMe‐DABCO]CuCl 4 ) is reported, which shows both excellent ferroelectricity and intriguing thermochromism. [DMe‐DABCO]CuCl 4 undergoes a ferroelectric phase transition from Pca2 1 to Pbcm at a significantly high Curie temperature of 413 K, accompanied by a color change from yellow to red that is due to the remarkable deformation of [CuCl 4 ] 2− tetrahedron, where the ferroelectric and paraelectric phases correspond to yellow and red, respectively. Combined with multiple bistable physical properties, [DMe‐DABCO]CuCl 4 would be a promising candidate for next‐generation smart devices, and should inspire further exploration of multifunctional molecular ferroelectrics.