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相关概念视频

Structural Isomerism02:34

Structural Isomerism

19.1K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN−...
19.1K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

41.0K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than...
41.0K
Metallic Solids02:37

Metallic Solids

18.1K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
18.1K
Coordination Number and Geometry02:57

Coordination Number and Geometry

15.4K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
15.4K
Newman Projections02:06

Newman Projections

16.2K
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
16.2K
Radicals: Electronic Structure and Geometry01:07

Radicals: Electronic Structure and Geometry

3.8K
This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
3.8K

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相关实验视频

Updated: May 20, 2025

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

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2D - 异化框架

Senhe Huang1, Pu Yan2, Zhiya Han3

  • 1The Soft2D Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.

Advanced materials (Deerfield Beach, Fla.)
|March 25, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了具有碳协调的新型二维金属有机框架 (MOF),实现超窄带间隙和高电荷流动性. 这些新的MOF显示出作为减少的电催化剂的前景,展示了一种新的先进材料类别.

关键词:
这是一个二维的2D.运营商移动性的运营商移动性异酸盐是同酸盐的一种.金属有机框架的框架.是的元素之一.

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Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

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相关实验视频

Last Updated: May 20, 2025

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 协调化学 协调化学

背景情况:

  • 2D金属有机框架 (MOF) 是具有可调节性质的多功能有机范德瓦尔斯材料.
  • 现有的二维MOF主要利用金属-异原子协调,而金属-碳协调仍然难以合成.
  • 在二维MOF中金属-碳协调对于开发具有独特电子性质的新材料至关重要.

研究的目的:

  • 报告基于-碳 (Rh-C) 协调的新型二维MOF的合成和特征.
  • 研究这些新材料的光电子特性和电荷传输能力.
  • 评估这些Rh-C 2D MOFs作为降解反应的电催化剂的潜力.

主要方法:

  • 使用异化联体和Rh (I) 金属节点合成2DMOF.
  • 结晶学分析以确定网络结构.
  • 太赫兹光谱测量电荷载体的移动性.
  • 对降解反应 (NRR) 的电催化试验.
  • 在现场实验以阐明催化机制.

主要成果:

  • 成功合成了具有准正方形格子网络和Rh-C协调的晶体2D MOF.
  • 由于Rh (I) -异氨酸相互作用,观察到超窄的带隙 (0.1-0.28 eV).
  • 实现了高达560±46厘米2V-1s-1.1的特殊短距离电荷移动性.
  • 对于高NH3产量 (56.0 ± 1.5μg h−1 mg_cat−1) 和法拉第效率 (87.1 ± 1.8%) 的NRR,证明了出色的电催化性能.
  • 通过实地研究确定了涉及Rh (I) 的双催化途径.

结论:

  • 这项工作开创了基于金属碳协调的二维MOF,特别是使用Rh-C键.
  • 合成的MOFs由于其高载体流动性,为先进的光电子设备表现出有希望的特性.
  • 这些发现为网状化学和催化开辟了新的途径,特别是用于降应用.