在共价有机框架中的维度依赖压力诱导排放记忆
Junxia Ren1, Yixuan Wang2, Yaozu Liu1
1College of Chemistry, Jilin University, Changchun, 130012, P.R. China.
Angewandte Chemie (International ed. in English)
|October 7, 2025
概括
聚合有机框架 (COF) 显示压力诱导的排放记忆效应,在压力释放后保留发光. 在 1D COF 中的这一发现为光学数据存储和压力传感器开辟了新的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 光物理学的光学物理学
背景情况:
- 具有记忆效应的刺激响应发光材料对于光学数据存储和压力传感至关重要.
- 晶体共价有机框架 (COF) 为先进的材料设计提供可调节的特性.
研究的目的:
- 在一系列具有不同维度 (1D,2D,3D) 的基于四乙烯的COF中研究压力诱导的排放记忆效应.
- 为了建立结构-维度-功能关系,控制水静压下的光物理反应.
主要方法:
- 1D (JUC-730,JUC-731),2D (JUC-732) 和3D (JUC-733) COFs 的合成.
- 在水静压下对光物理反应的系统研究.
- 在现场FT-IR,粉末X射线衍射 (PXRD) 和DFT分析以阐明机制.
主要成果:
- 在晶体COF中首次观察到压力诱导的发射记忆效应,特别是在1D框架中,如JUC-730.
- 在压力释放 (PIEE) 后,JUC-730表现出持续的2.4倍光增强.
- 在JUC-730中,记忆效应归因于异型单元细胞收缩和aryl-O-aryl链接的结构锁定,稳定了发射状态.
结论:
- 框架维度对光物理反应和COF中排放记忆效应的表现产生重大影响.
- 1D COF显示出机械可编程发光材料的巨大潜力.
- 这些发现为开发具有定制光学内存能力的新型压力反应材料提供了设计策略.
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