洞察二铜 (II,II) 复合物中非共价相互作用的洞察力,这些复合物具有纳夫二基架:阴离子指定的电化学
Jonathan De Tovar1, Christian Philouze1, Aurore Thibon-Pourret1
1Université Grenoble Alpes, CNRS, DCM, UMR 5250, 38000 Grenoble, France. Jonathan.De-Tovar@univ-grenoble-alpes.fr.
Chemical communications (Cambridge, England)
|February 5, 2024
概括
合成的二铜 (II,II) 复合体表现出离子依赖的电化学特性. 非共价相互作用形成离子对,显著改变这些铜复合物的氧化潜力.
科学领域:
- 无机化学 无机化学
- 协调化学 协调化学
- 电化学 电化学 电化学
背景情况:
- 双铜复合物在催化和生物无机化学中非常重要.
- 纳弗氨酸连接物为金属离子提供独特的协调环境.
- 了解反离子对复杂性质的影响至关重要.
研究的目的:
- 为了合成和表征具有纳夫提里丁支架的新 bis (μ-氧化) 二铜 (II,II) 复合物.
- 为了研究不同离子对这些二铜复合物的电化学行为的影响.
- 阐明非共价相互作用在调节氧化还原性质中的作用.
主要方法:
- 铜复合物的合成和表征.
- 循环电压测量用于电化学分析.
- 用X射线衍射和光谱进行结构阐明.
主要成果:
- 一系列与纳夫提里丁连接体一起成功合成了 bis (μ-氧化) 二铜 (II,II) 复合体.
- 电化学研究表明,离子的性质显著影响了氧化还原潜力.
- X射线衍射和光谱数据证实了通过非共价相互作用形成亲密的离子对.
- 对于CuII物种的单氧化,观察到大约270mV的电位差异,归因于离子配对.
结论:
- 二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜-二氧化铜.
- 导致密切离子对形成的非共价相互作用在调整氧化还原行为的过程中起着至关重要的作用.
- 这项研究提供了对具有量身定制的电化学性质的铜复合体合理设计的见解.
相关概念视频
02:42Valence Bond Theory
8.6K
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...
8.6K
02:58Crystal Field Theory - Octahedral Complexes
26.5K
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...
26.5K
03:02Colors and Magnetism
11.7K
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...
11.7K
03:45Formation of Complex Ions
23.6K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.6K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.6K
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 the dxy,...
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 the dxy,...
42.6K
02:51Metal-Ligand Bonds
20.8K
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...
20.8K