在电磁场下的导电金属有机框架中的Cu─X债券调节导电和极化损失
Siyao Cheng1,2, Qinglin Zhou3, Daohu Sheng3
1MIIT Key Laboratory of Advanced Display Materials and Devices & Materials Physical and Chemical Research and Practice Center, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|June 10, 2025
概括
研究人员开发了一种新的策略,使用修饰的配体来增强电导金属有机框架 (c-MOFs) 的电磁波 (EMW) 吸收. 这种方法实现了创纪录的-63.03dB反射损失,显著提高了EMW吸收能力.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 物理 物理学 物理
背景情况:
- 导电金属有机框架 (c-MOFs) 对电磁波 (EMW) 吸收至关重要.
- 在c-MOF中增强EMW吸收需要优化导电和极化损失.
- 层间/层内导电和偏振的网状调制仍然是一个挑战.
研究的目的:
- 为控制c-MOF结构引入一个以连接体替代为指导的策略.
- 研究网状调制对层间/层内传导和极化损失的影响.
- 为了提高c-MOF中的EMW吸收性能.
主要方法:
- 通过使用三烯-X合物 (X = -NH2, -OH, -SH) 合成了一组基于铜的异构型c-MOF.
- 通过不同的Cu-X键,系统地研究了导电和极化损失的协同效应.
- 在电磁场下评估EMW吸收性能.
主要成果:
- 在Cu3 ((HITP) 2 (X = -NH2) 中实现了最佳的电磁 (EM) 损失能力.
- 在3-18 GHz有效吸收频段内获得了63.03dB的记录反射损失.
- 在分子和原子尺度上对电荷移动性和介电损失进行了证明控制.
结论:
- 联体替代策略有效控制c-MOF结构,以提高EMW吸收.
- Cu3 ((HITP) 2为c-MOFs的EM损失设定了一个新的基准.
- 这种方法为先进的EMW吸收器提供了一种调整电荷移动性和介电性质的途径.
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