Sui Yan, Liu Dong-Sheng, Chen Wen-Tong, Wang Liang-Jun, Ma Yu-Xiao, Lai Hui-Qi, Zhou Yu-Wei, Wen He-Rui
School of Chemistry and Chemical Engineering, The Key Laboratory of Coordination Chemistry of Jiangxi Province, Humic Acid Utilization Engineering Research Center of Jiangxi Province, Jinggangshan University, Ji'An, Jiangxi, 343009, P.R. China.
Chem Asian J. 2020 May 15;15(10):1621-1626. doi: 10.1002/asia.202000241. Epub 2020 Apr 20.
Both ferroelectric and switchable dielectric behaviors are of great academic value and practical significance, but they usually exist alone. If combine the two properties into one compound, it will be more valuable in practical application. In this paper, quasi-spherical (2-bromoethyl) trimethylammonium cation was used to match with [CdBr ] anion, and a new organic-inorganic hybrid compound ([BrCH CH N(CH ) ] [CdBr ] , BETABCdBr) was obtained and carefully characterized. The results indicate that this compound undergoes two continuous reversible phase transition around 342 K and 390 K. It could respectively exhibit ferroelectric and switchable dielectric properties over different temperature range. This work may provide a new clue to explore new types of bifunctional phase transition smart materials to meet various application requirements.
铁电行为和可切换介电行为都具有重要的学术价值和实际意义，但它们通常是独立存在的。如果将这两种特性结合到一种化合物中，在实际应用中将更具价值。本文利用准球形的（2-溴乙基）三甲基铵阳离子与[CdBr ]阴离子相匹配，得到了一种新型有机-无机杂化化合物（[BrCH₂CH₂N(CH₃)₃]₂[CdBr₄]，BETABCdBr）并对其进行了详细表征。结果表明，该化合物在342 K和390 K左右经历了两个连续的可逆相变。它可以在不同温度范围内分别表现出铁电和可切换介电特性。这项工作可能为探索新型双功能相变智能材料以满足各种应用需求提供新的线索。
