阴离子交换诱导了一个纳米孔隙八核Cu (II) 轮的调节性特性,具有双螺旋结构
Jin'an Zhao1, Liwei Mi, Jiyong Hu
1Department of Chemistry, Zhengzhou University, Henan 450052, PR China.
Journal of the American Chemical Society
|October 23, 2008
概括
使用telmisartan合成了一种新的铜(II) 轮. 用其他金属取代中心铜离子有效地改变了材料.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
背景情况:
- 泰尔米沙坦是一种临床药物,可用于协调化学.
- 金属有机框架通过离子交换提供可调节的特性.
研究的目的:
- 使用telmisartan合成了一种新的八核铜(II) 轮.
- 为了研究中心金属离子交换对车轮特性的影响.
主要方法:
- 泰尔米萨坦与硫酸铜的反应形成了八核轮.
- 与,和铁盐的离子交换反应.
主要成果:
- 一个直径为2.88nm的双螺旋八核Cu(II) 轮成功合成.
- 部分或全部用,或铁取代中心铜离子,大大改变了材料的特性.
- 中央金属离子交换提供了一种多功能方法来修改属性.
结论:
- 中心金属离子交换是一种强大的策略,用于定制晶体材料的特性.
- 这种方法允许在适度条件下通过简单地改变中心金属离子来修改属性.
相关概念视频
Crystal Field Theory - Octahedral Complexes
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...
Colors and Magnetism
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 eye.
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 eye.
Valence Bond Theory
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...
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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,...

