对基利达胺的系统研究:从分子复合物到M-HOF和MOF
Mirjam P M Poschmann1, Özge Alan1, Sho Ito2
1Institute of Inorganic Chemistry, Christian-Albrechts-University Kiel, Max-Eyth-Street 2, 24118 Kiel, Germany.
Inorganic chemistry
|June 29, 2023
概括
这项研究合成并描述了三种新型的基利达胺,包括含有多孔金属的结有机框架和独特的金属有机框架. 这些化合物表现出稳定性和选择性多孔性,在气体储存和分离方面具有潜在的应用.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
背景情况:
- 基于的材料因其多样化的结构可能性和应用而引起人们的兴趣.
- 利达胺酸是一种多功能连接体,能够形成各种协调复合体.
- 开发具有可调节性质的多孔材料仍然是材料科学的关键挑战.
研究的目的:
- 为了合成和描述新型的基利达胺复合物.
- 研究这些化合物的结构多样性和性质,包括多孔性和稳定性.
- 探索这些材料在气体吸附和分离方面的潜力.
主要方法:
- 使用凯利达胺酸对基利达胺的高通量合成和表征.
- 单晶X射线衍射和粉末X射线衍射 (PXRD) 用于结构阐明.
- 单晶3D电子衍射和瑞特维尔德精细化,用于具有挑战性的结构.
- 气体 (N2,CO2) 和水吸附等热体以确定孔隙性和表面积 (BET).
主要成果:
- 成功合成了三种晶体基利达胺:一个分子复合物 (1),一个多孔的M-HOF (2) 和一个Zr-MOF (3) 具有罕见的单核IBU.
- 利酸盐离子作为平边形链接体,在化合物3中具有额外的阿里洛克西协调.
- 化合物2表现出灵活的,多孔的水性行为,而化合物3对N2,CO2和各种溶剂具有多孔性,BET表面积为410m2/g.
- 所有化合物都在有机溶剂中表现出稳定性,在280°C以上的温度稳定性.
结论:
- 这项研究成功地产生了具有不同性质的多种基利酸盐结构.
- 化合物3代表了一种新的Zr-MOF,具有独特的构造单元和显著的气体吸附孔隙.
- 这些材料在需要选择性吸附和分离的应用中表现有前途,因为它们具有可调节的多孔性和稳定性.
相关概念视频
02:58Crystal Field Theory - Octahedral Complexes
26.9K
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...
26.9K
02:42Valence Bond Theory
8.8K
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...
8.8K
01:19Complexation Equilibria: The Chelate Effect
564
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
564
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
43.1K
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,...
43.1K
03:02Colors and Magnetism
12.0K
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...
12.0K
02:58Properties of Transition Metals
26.4K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
26.4K