低对称性金属超分子的构造和功能
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin 130012, China.
Accounts of chemical research
|May 26, 2025
概括
化学家们开发了控制低对称性金属超分子组装的策略,克服了为各种应用创造这些复杂结构的挑战.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 协调化学 协调化学
背景情况:
- 自然系统利用高对称性和低对称性结构,低对称性形式发挥着关键的生物学作用.
- 设计和控制低对称性金属-超分子架构的自组装,由于结构不可预测和功能有限,因此存在重大挑战.
- 现有的方法与各种结构的类似热力学稳定性作斗争,导致无法控制的自组装,并阻碍了功能化.
研究的目的:
- 开发低对称性金属超分子架构的可控自组装策略.
- 探索精确构建的低对称性超分子系统的功能.
- 克服构建和功能化低对称性金属超分子的局限性.
主要方法:
- 精确的配置控制通过微妙的连接体调制实现.
- 通过选择性自我补充的协调动机建立的连接体和金属离子选择性.
- 增强绝缘效应,以直接协调控制组装的模式.
主要成果:
- 成功制备了低对称性的金属超分子,并进行了控制的组装.
- 在多层结构中展示有组织的色彩安排的功能.
- 开发了一种多功能低对称性镜系统,具有高光发光量子产量,可调节的发光,机械互锁结构和选择性客体封装.
结论:
- 开发的策略可以精确控制低对称性金属超分子的自我组装.
- 功能化的低对称性超分子系统可以可靠地构建并表现出多样化的特性.
- 这项研究为设计具有定制功能的高级低对称性超分子材料提供了基础.
更多相关视频
相关概念视频
Stereoisomerism
12.5K
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...
12.5K
Metal-Ligand Bonds
21.6K
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...
21.6K
Structural Isomerism
19.7K
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...
19.7K
Complexation Equilibria: Factors Influencing Stability of Complexes
494
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
494
Valence Bond Theory
9.7K
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...
9.7K
Colors and Magnetism
12.4K
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...
12.4K


