带有金属电荷传输的波形二维结合金属有机框架
Jianjun Zhang1, Guojun Zhou2, Hio-Ieng Un3
1Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden 01062, Germany.
Journal of the American Chemical Society
|October 18, 2023
概括
研究人员使用扭曲联体开发了一种新的波形二维合金属有机框架 (2D c-MOF). 这种导电材料具有内在的金属传输性能,并对电子和储能应用具有前景.
科学领域:
- 材料科学
- 化学学
- 物理
背景情况:
- 双维的金属有机框架 (2D c-MOF) 对电子和自旋电子具有前景.
- 目前的二维c-MOF主要使用平面连接体,限制了从曲或扭曲连接体的新电子状态的探索.
- 开发具有扭曲连接体的二维c-MOF对于提高其电子特性和应用至关重要.
研究的目的:
- 通过扭曲的配体合成和表征一种新的波形2Dc-MOF.
- 研究新材料的电子传输特性.
- 评估这种二维c-MOF在储能应用中的潜力.
主要方法:
- 使用化核心扭曲的六-六-六-六子 (HFcHBC) 连接物合成Cu-catecholate波状2D c-MOF (Cu3(HFcHBC) 2).
- 使用高分辨率传输电子显微镜 (HRTEM) 和连续旋转电子衍射 (cRED) 来确定晶体结构.
- 在晶体膜和单晶体上进行电导度测量,包括温度依赖性研究.
- 对储能应用的电化学性能评估.
主要成果:
- 一个波动的2D c-MOF与蜂格子结构和AA-eclipsed堆叠成功合成.
- 理论计算预测了金属的行为,由单晶的温度依赖导电性测量证实,显示金属传输的室温导电性为5.2 S cm-1.
- 由于粒度边界,该材料在宏观尺度上表现出半导体行为,但在单晶水平上表现出内在金属特性.
- 2D c-MOF作为储能电极材料,具有163.3 F g-1的容量和出色的循环使用性.
结论:
- 由扭曲联体构成的波形二维c-MOF可以表现出内在的金属传输.
- 这种新的导电MOF类型具有先进的电子和储能应用的巨大潜力.
- 该研究强调了联体设计在2D c-MOF中实现所需电子性能的重要性.
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