相关实验视频
Updated: Jul 13, 2026
11:14
Designing Silk-silk Protein Alloy Materials for Biomedical Applications
Published on: August 13, 2014
复杂异:一个非凡的连接体的协调性质
Sylvia M Draper1, Daniel J Gregg, Emma R Schofield
1Department of Chemistry, University of Dublin, Trinity College, D2, Ireland. smdraper@tcd.ie
Journal of the American Chemical Society
|July 15, 2004
概括
这项研究引入了异超 (N-HSB) 作为和复合物的新联体. 由此产生的N-HSB金属复合体具有独特的光吸收和发射特性,包括近IR发射.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 光物理学的光学物理学
背景情况:
- 异超 (N-HSB) 是一类刚性芳香化合物.
- 单联体在设计具有特定性质的金属复合物中起着至关重要的作用.
研究的目的:
- 为了合成和表征新的 (II) 和 (II) 复合物,使用四---丁-) -二--皮里米迪诺-冠 (1) 作为单联体.
- 研究金属协调对N-HSB连接体光物理和电化学性质的影响.
主要方法:
- 合成N-HSB连接体及其Pd (II) 和Ru (II) 复合体.
- 使用1H NMR,IR光谱和ESI-MS进行表征.
- 吸收和排放光谱测量.
- 电化学分析 (循环电压计).
主要成果:
- 新的N-协调Pd(II) 和Ru(II) 复合物, [Pd(eta3-C3H5)(1)]PF6 (2) 和 [Ru(bpy) 2(1)](PF6) 2 (3a,3b) 已成功合成和表征.
- 金属协调显著改变了N-HSB配体的吸收和排放光谱.
- (II) 复合物表现出广泛的可见吸收,作为"黑色"吸收器,具有低能MLCT波段和近IR辐射 (λmax = 880 nm),具有长寿命 (320 ns在77 K).
- 电化学研究显示,复合体中的N-HSB连接体逐步减少.
- 核磁共振研究表明,在溶液中可能存在聚合.
结论:
- -------------------------------------------------------------------------------------------------------------------------------------------------------------
- 该N-HSB配体促进了Pd (II) 和Ru (II) 复合体中独特的光物理性质,包括高效的近IR发射.
- 这些发现为在需要专门的吸光和发光材料的领域的应用开辟了道路.
相关概念视频
02:57Coordination Number and Geometry
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.
02:34Structural Isomerism
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 be...
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 be...
02:52Stereoisomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
01:23Complexation Equilibria: Overview
Complexation reactions take place when dative or coordinate covalent bonds form between metal ions and ligands. The compounds formed in these reactions are called coordination compounds. The number of bonds formed between the metal ion and the ligands is called its coordination number. Generally, most metal ions in an aqueous solution are solvated by water molecules and thus exist as aqua complexes.
The equilibrium constant of the complexation reaction is represented as the formation constant...
The equilibrium constant of the complexation reaction is represented as the formation constant...