Ferroelectric properties, narrow band gap and ultra-large reversible entropy change in a novel nonlinear ionic chromium(vi) compound

被引：17

作者：

Han, Ding-Chong ^{[1
]}

Gong, Zhi-Xiang ^{[1
]}

Song, Ning ^{[1
]}

Tan, Yu-Hui ^{[1
]}

Li, Yu-Kong ^{[1
]}

Tang, Yun-Zhi ^{[1
]}

Du, Peng-Kang ^{[1
]}

Zhang, Hao ^{[1
]}

机构：

[1] Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, Ganzhou 341000, Jiangxi, Peoples R China

来源：

CHEMICAL COMMUNICATIONS | 2021年 / 57卷 / 85期

关键词：

PHASE-TRANSITION; PEROVSKITE; DISORDER;

D O I：

10.1039/d1cc04751e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel chromium(vi)-based compound, [(CH3CH2)(3)N(CH2Cl)][CrO3Cl] (1), undergoes a high-temperature phase transition at around 340.9 K, accompanied by an ultra-large entropy change of 63.49 J mol(-1) K-1. Compound 1 exhibits a moderate ferroelectric polarization of 0.48 mu C cm(-2) and a remarkable CD signal. Strikingly, 1 occupies a narrow band gap of 2.22 eV, which is chiefly attributed to the inorganic [CrO3Cl](-) tetrahedron. It is believed that these findings will contribute to an alternative pathway for the design of multifunctional ferroelectric materials, whose potential applications will be in semiconductors, energy storage, etc.

引用

页码：11225 / 11228

页数：4

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