在Ni-Diamine导电MOF中进行超级电荷传输
Jiande Wang1, Tianyang Chen1, Mingyu Jeon1,2
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|July 15, 2024
概括
新的2D导电金属有机框架 (2D cMOF) 具有高电导率. 基于Ni的2D cMOF达到4.5 S cm-1,超过了这些材料的先前基准.
科学领域:
- 材料科学
- 化学学
- 凝聚物质物理学
背景情况:
- 二维导电金属有机框架 (2D cMOF) 是晶体范德瓦尔斯层材料,可调节的孔隙性和高电导率.
- 现有的二维cMOF通常缺乏室温电导率超过1S cm-1,这是活性炭所设定的基准.
- 众所周知,尼-胺结合促进了高导电性,但尼-胺MOF难以合成.
研究的目的:
- 设计和合成新的2DcMOF,使用Orto-Diamine链接器.
- 研究结构与性能关系,特别是金属节点 (Ni和Cu) 对电导性的影响.
- 探索这些材料在需要高电导率的应用中的潜力.
主要方法:
- 合成了两种新的2D cMOF:M3(HITT) 2,其中M=Ni或Cu,利用正体胺连接.
- 在室温 (298 K) 上测量电导率.
- 用光谱分析来了解电子结构和电荷载体特性.
主要成果:
- 基于Ni的2D cMOF,Ni3(HITT)2,在298K时达到4.5S cm-1的电导率.
- 基于Cu的2D cMOF,Cu3(HITT)2,在空气氧化时表现出从0.05到10-6 S cm-1的导电性,明显低于Ni模拟.
- 与Cu3(HITT)2相比,Ni3(HITT)2显示出更强的平面 π-d 结合和更高的电荷载体密度.
- 在Cu2+/Cu+中混合度允许导电性调制超过四个数量级.
结论:
- орто-胺连接剂在制造高导电性的二维cMOF方面是有效的.
- 与Cu节点相比,Ni节点显著增强平面内π-d合和电荷载体密度,导致电导率更高.
- 这项工作促进了对二维cMOF导电性的金属节点影响的理解,并突出了胺系统的潜力.
更多相关视频
06:45Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior
Published on: March 8, 2024
7.3K
07:14Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
2.7K
相关概念视频
02:51Metal-Ligand Bonds
20.7K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.7K
02:42Valence Bond Theory
8.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.5K
02:58Crystal Field Theory - Octahedral Complexes
26.3K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.3K