Dehydration-triggered structural phase transition-associated ferroelectricity in a hybrid perovskite-type crystal  

作　　者：Zhi-Yuan Yue Hua-Kai Li Na Wang Shan-Shan Liu Le-Ping Miao Heng-Yun Ye Chao Shi 

机构地区：[1]Chaotic Matter Science Research Center,Jiangxi University of Science and Technology,Ganzhou 341000,China

出　　处：《Chinese Chemical Letters》2024年第10期461-464,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22175079,22205087 and 22275075);Natural Science Foundation of Jiangxi Province(Nos.20225BCJ23006 and 20224ACB204002);Science and Technology Project of Jiangxi Provincial Department of Education(No.GJJ210880)。

摘　　要：Since the appearance of Rochelle salt,ferroelectrics have received extensive attention from researchers due to they are playing an important role in sensors,memories,mechanical actuation,and so on.In recent years,with the rapid development of molecular ferroelectrics,high-performance molecular ferroelectrics have become effective complement to inorganic ferroelectrics.However,compared with inorganic ferroelectrics,the family of molecular ferroelectrics is relatively scarce,and exploring highperformance ferroelectric materials through new synthesis strategies has become the trend of molecular ferroelectrics.Here,we successfully transformed non-polar material 1(2-H_(2)PCA)_(2)(H_(2)O)CdCl_(6)(2-H_(2)PCA=2-picolylamine cation)into polar material 2(2-H_(2)PCA)2CdCl_(6)by single-crystal to single-crystal transformation(SCSCT).Meanwhile,2 exhibits clear ferroelectricity with a high-temperature Tc of 378 K,a Ps of 1.18μC/cm^(2)at 300 K.This work not only realizes the purpose of synthesizing ferroelectrics by forming polar structures by SCSCT,but also realizes the reversibility of SCSCT,which provides ideas for the construction and exploration of new molecular ferroelectrics.

关 键 词：Hybrid perovskite Ferroelectric materials Single-crystal to single-crystal transformation Phase transition Stimulus-structure-response 

分 类 号：TB34[一般工业技术—材料科学与工程]