在光霍夫曼型协调聚合物中同时发生磁电转换
Fei-Fei Yan1, Dan Liu1, Rui Cai2
1State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China. mengys@dlut.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|November 27, 2023
概括
研究人员开发了一种新的2D协调聚合物与铁. 这种磁性分子材料表现出同时旋转交叉,光和介电切换的先进应用.
科学领域:
- 材料科学 材料科学 材料科学
- 协调化学 协调化学
- 固态化学 固态化学
背景情况:
- 多功能分子材料对于像分子开关和传感器这样的先进技术至关重要.
- 设计具有合磁性,介电性和光学性质的材料仍然是一个重大挑战.
- 基于铁的协调聚合物是旋转交叉 (SCO) 应用的有希望的候选者.
研究的目的:
- 为了合成和表征一种新的基于2D Fe (II) 的霍夫曼型协调聚合物.
- 为了研究旋转交叉,光和介电性质之间的相互作用.
- 探索这种材料在多功能分子装置中的潜力.
主要方法:
- 使用发光联体物 (DPPE) 合成2D Fe(II) 协调聚合物.
- 单晶结构分析以确定材料的结构.
- 可变温度的磁性和光辐射光谱学.
- 介电测量以探测旋转过渡期间的电性质.
主要成果:
- 一种新型的2D霍夫曼型协调聚合物{Fe(DPPE) 2[Ag(CN) 2} 2·2EtOH (1) 已成功合成.
- 在T1/2 = 231 K时观察到热诱导的旋转交叉 (SCO).
- 同时存在的旋转交叉和光特性得到证实.
- 在SCO期间检测到显著的介电变化 (Δε' = 1.2 在0.5 kHz),表明同时发生磁性和介电切换.
结论:
- 合成的协调聚合物表现出多功能性质,包括SCO,光和介电切换.
- 观察到的现象归因于Fe的电子重新排列和协调球形变形.
- 这项研究为设计具有合磁性和介电功能的先进分子材料提供了一条途径.
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