在二维共价有机框架中以拓控制的性和旋转选择性
Chao Jiang1, Chuanyu Jin2, Yao Lv3
1School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.
Journal of the American Chemical Society
|January 8, 2026
概括
在二维共价有机框架 (COF) 中的拓异构使得可调的旋转极化为旋转电子学. 在
科学领域:
- 材料科学
- 凝聚物质物理学
- 有机化学
背景情况:
- 电子自旋控制对于自旋电子学至关重要,由性诱导的自旋选择性 (CISS) 效应使自旋极化传输成为可能.
- 在固态材料中实现强大且可调节的旋转极化是一个重大挑战.
研究的目的:
- 在二维共价有机框架 (COF) 中研究拓异构作为调节性和旋转选择性的策略.
- 合成和描述具有不同网络拓 (kgm和sql) 的两个不同的合性COF (TPE-KGM和TPE-SQL).
主要方法:
- 从相同的前体合成两种基于Zn的性COF (TPE-KGM和TPE-SQL).
- 使用循环二极化 (CD) 和循环极化发光 (CPL) 进行表征,以评估奇拉放大.
- 磁导原子力显微镜 (mc-AFM) 用于测量旋转极化.
- 用WSe2制造范德瓦尔斯异构结构,用于旋转注入研究.
主要成果:
- 与kgm拓COF相比,sql拓COF表现出长距离的结构性和增强的旋转选择性 (83%的极化).
- CD 和 CPL 测量证实了 sql 拓中的更强的奇拉放大.
- 在WSe2异构中注入旋转时,TPE-SQL的圆极化在78K时比TPE-KGM高 (8.1%).
结论:
- 2D COF中的拓异构提供了控制性和旋转选择性的直接途径.
- 这种方法推进了用于自旋电子应用的合光电子和谷电子材料的设计.
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