Issue 58, 2019
From the journal:

Chemical Communications

H/F substituted perovskite compounds with above-room-temperature ferroelasticity: [(CH3)4P][Cd(SCN)3] and [(CH3)3PCH2F][Cd(SCN)3]†

Ying-Jie Cao,a   Lin Zhou,a   Ping-Ping Shi,a   Qiong Ye ORCID logo *a  and  Da-Wei Fu ORCID logo *a  

* Corresponding authors

a Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing, P. R. China
E-mail: yeqiong@seu.edu.cn, dawei@seu.edu.cn

Abstract

An organic–inorganic perovskite compound [(CH3)4P][Cd(SCN)3] (1) and its fluorine-substituted product [(CH3)3PCH2F][Cd(SCN)3] (2) exhibit ferroelastic phase transitions above room temperature. The very close van der Waals radii of H and F atoms ensure isomorphism of the crystal structures. However, the higher phase transition temperature, stronger ferroelastic spontaneous strain value and dielectric properties of 2 can possibly be explained by differences in the electronegativity between F and H atoms.

Graphical abstract: H/F substituted perovskite compounds with above-room-temperature ferroelasticity: [(CH3)4P][Cd(SCN)3] and [(CH3)3PCH2F][Cd(SCN)3]

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Article information

DOI
https://doi.org/10.1039/C9CC03857D
Article type
Communication
Submitted
18 May 2019
Accepted
21 Jun 2019
First published
21 Jun 2019

Chem. Commun., 2019,55, 8418-8421

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H/F substituted perovskite compounds with above-room-temperature ferroelasticity: [(CH3)4P][Cd(SCN)3] and [(CH3)3PCH2F][Cd(SCN)3]

Y. Cao, L. Zhou, P. Shi, Q. Ye and D. Fu, Chem. Commun., 2019, 55, 8418 DOI: 10.1039/C9CC03857D

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