客人交流通过单晶单晶转换在一个灵活的结合框架
Wenchang Xiao1, Chunhua Hu, Michael D Ward
1Molecular Design Institute, Department of Chemistry, New York University , 100 Washington Square East, New York, New York 10003-6688, United States.
Journal of the American Chemical Society
|September 24, 2014
概括
一个新的关尼迪尼和TSPB分子框架显示了可逆客分子吸附和交换的灵活通道. 这种材料允许通过客体交换创建单晶纳入化合物,即使当直接结晶失败时也是如此.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 关尼 (G) 和1,2,4,5-四,4-硫烯 (TSPB) 形成了分子框架.
- 之前的GS框架缺乏灵活性,用于单晶中的客分子交换.
研究的目的:
- 为可逆客分子吸附和交换开发灵活的分子框架.
- 在结合框架中研究单晶到单晶转换 (SCSCT).
- 通过客人交流探索单晶纳入化合物的合成.
主要方法:
- 单晶X射线衍射用于验证客人交换期间的结构变化.
- 在框架道内分析客分子扩散速率和机制.
- 在完整的框架中通过客人交流合成包含化合物.
主要成果:
- 合成了一个新的G4TSPB框架,包含三个独特的1D通道.
- 该框架通过循环通道膨胀/收缩证明了可逆的客分子吸附/脱附.
- 在所有三个频道中都观察到快速的客户交换 (扩散度~10^-6 cm^2 s^-1),具有不同的扩散机制.
- 通过客人交换成功合成了单晶纳入化合物,这种方法不能通过直接结晶来实现.
结论:
- 灵活的G4TSPB框架使客分子相互作用的动态通道调制成为可能.
- 在这种键框架中,SCSCT是可行的,允许快速的客人交换.
- 这种方法为合成复杂的单晶纳入化合物提供了一条新的途径.
更多相关视频
09:15Growing Protein Crystals with Distinct Dimensions Using Automated Crystallization Coupled with In Situ Dynamic Light Scattering
Published on: August 14, 2018
12.2K
10:10Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures
Published on: December 1, 2020
5.3K
相关概念视频
02:58Crystal Field Theory - Octahedral Complexes
28.4K
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...
28.4K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
47.5K
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...
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...
47.5K
00:26Hydrogen Bonds
109.1K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
109.1K