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Reversible Thermochromism and Strong Ferromagnetism in Two‐Dimensional Hybrid Perovskites
Author(s) -
Sun Bing,
Liu XiaoFei,
Li XiangYang,
Cao Yang,
Yan Ze,
Fu Lin,
Tang Nujiang,
Wang Qiang,
Shao Xiangfeng,
Yang Dezheng,
Zhang HaoLi
Publication year - 2020
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.201910701
Subject(s) - thermochromism , curie temperature , ferromagnetism , materials science , powder diffraction , diffraction , condensed matter physics , thermal stability , conductivity , crystallography , chemistry , optics , organic chemistry , physics
Two‐dimensional (2D) hybrid perovskites have shown many attractive properties associated with their soft lattices and multiple quantum well structure. Herein, we report the synthesis and characterization of two new multifunctional 2D hybrid perovskites, (PED)CuCl 4 and (BED) 2 CuCl 6 , which show reversible thermochromic behavior, dramatic temperature‐dependent conductivity change, and strong ferromagnetism. Upon temperature change, the (PED)CuCl 4 and (BED) 2 CuCl 6 crystals exhibit a reversible color change between yellow and red‐brown. The associated structural changes were monitored by in situ temperature‐dependent powder X‐ray diffraction (PXRD). The (BED) 2 CuCl 6 exhibits superior thermal stability, with a thermochromic working temperature up to 443 K. The conductivity of (BED) 2 CuCl 6 changes over six orders of magnitude upon temperature change. The 2D perovskites exhibit ferromagnetic properties with Curie temperatures around 13 K.