合成与表征一种新型有机-无机杂化铁电体：(CHN)[InBr][InBr]·HO。

Synthesis and characterization of a new organic-inorganic hybrid ferroelectric: (CHN)[InBr][InBr]·HO.

机构信息

Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi, 830046 Xinjiang, P. R. China.

出版信息

Dalton Trans. 2019 Nov 26;48(46):17402-17407. doi: 10.1039/c9dt03970h.

DOI:10.1039/c9dt03970h

PMID:31742292

Abstract

Organic-inorganic hybrid ferroelectric materials have attracted attention from researchers as promising candidates for functional materials, because they combine high performance and low cost. Herein, a new organic-inorganic hybrid ferroelectric material (C4H10N)6[InBr6][InBr4]3·H2O (1) was synthesized and characterized. The compound undergoes a paraelectric-ferroelectric phase transition at TC = 232 K, which is investigated by differential scanning calorimetry (DSC), dielectric measurements and variable-temperature structural analyses. Crystal structure analyses indicated that the disorder-order transition of Br atoms in [InBr4]- anions depending on temperature was the main factor driving the phase transition from Pbcn to Pna21. This finding will open up a new direction to probe the organic-inorganic hybrid molecular ferroelectric phase transition materials.

摘要

有机-无机杂化铁电材料因其兼具高性能和低成本的特点，而受到研究人员的关注，有望成为功能材料的候选材料。在此，我们合成并表征了一种新型的有机-无机杂化铁电材料（C4H10N）6[InBr6][InBr4]3·H2O（1）。通过差示扫描量热法（DSC）、介电测量和变温结构分析研究了化合物在 TC = 232 K 时发生的顺电-铁电相转变。晶体结构分析表明，[InBr4]-阴离子中 Br 原子的无序-有序转变取决于温度，这是导致 Pbcn 相到 Pna21 相转变的主要因素。这一发现为探索有机-无机杂化分子铁电相变材料开辟了新的方向。