三个不同的氧化状态 (II/II,II/III和III/III) 的二氧化铜复合体
Kai Hua1, Fei Xie2, Shengfa Ye2
1Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China.
JACS Au
|November 29, 2024
概括
这项研究详细介绍了三种氧化状态中的二氧化铜复合体,揭示了结构和电子变化. 它提供了对混合价值铜系统及其氧化还原行为的关键见解.
科学领域:
- 无机化学 无机化学 有机化学
- 有机金属化学 有机金属化学
- 协调化学 协调化学
背景情况:
- 基铜复合体在催化和材料科学中至关重要.
- 了解它们的电子结构和氧化还原行为对于开发新应用是必不可少的.
- 之前的研究已经探索了各种铜氧化状态,但在单个连接体支架内跨越多个状态的系统调查是有限的.
研究的目的:
- 在三个不同的氧化状态中合成和描述二氧化铜系统:[CuII CuII] (1),[CuII CuIII] (2),和[CuIII CuIII] (3).
- 阐明与这些复合体中的氧化还原转换相关的几何和电子结构变化.
- 在Robin和Day分类中调查混合价值二甲基铜 (II,III) 复合物 (2) 的性质.
主要方法:
- 铜复合物的合成和结构特征.
- 用X射线衍射 (XRD) 进行精确的几何测定.
- 光谱分析包括核磁共振 (NMR),紫外线和电子磁共振 (EPR).
- 密度函数理论 (DFT) 计算用于电子结构分析.
主要成果:
- 在不同的氧化状态下成功合成和表征了三种二氧化铜复合物 ([CuII CuII],[CuII CuIII],[CuIII CuIII]).
- 使用XRD,光谱和DFT的组合确定了几何和电子结构.
- 提供了混合价值二甲基铜 (II,III) 复合物的第一个结构确定 (2),将其定位在I类和II类系统之间.
结论:
- 宏环联体支架有效地稳定了跨多个氧化状态的二甲基铜复合体.
- 系统的结构和电子变化被观察到,以回应氧化还原转换.
- 这项研究有助于更好地理解混合价值铜系统中的价值移位.
更多相关视频
11:04Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
Published on: September 7, 2019
9.1K
10:42Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
10.6K
相关概念视频
02:57Coordination Number and Geometry
15.5K
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.
15.5K
03:02Colors and Magnetism
11.5K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.5K
02:58Properties of Transition Metals
25.1K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
25.1K
02:54Coordination Compounds and Nomenclature
21.2K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
21.2K
02:34Structural 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− can...
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− can...
19.1K