禾中的针:封闭毛孔中的过渡性多孔性 方格格子协调网络
Kyriaki Koupepidou1, Alan C Eaby1, Debobroto Sensharma1
1Bernal Institute, Department of Chemical Sciences, University of Limerick, Limerick, V94 T9PX, Ireland.
Angewandte Chemie (International ed. in English)
|January 21, 2025
概括
这项研究揭示了气体如何通过晶体固体中的闭孔移动,使用一种新的协调网络. 该材料在二氧化碳上选择性地吸附乙,这表明气体分离应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 了解客人通过晶体固体中离散的空隙进行运输是具有挑战性的.
- 协调网络为气体吸附研究提供可调节的结构.
- 链接器灵活性在客人传播中的作用仍然是一个活跃的研究领域.
研究的目的:
- 为了研究一个无孔协调网络的气体吸附特性,{[Co(bib) 2Cl2]·2MeOH}n (sql-bib-Co-Cl-α).
- 为了阐明客人运输机制通过关闭的孔通过门打开.
- 探索这种材料在选择性气体吸附和分离方面的潜力.
主要方法:
- 合成和表征{[Co(bib) 2Cl2]·2MeOH}n (sql-bib-Co-Cl-α) 的情况.
- 通过粉末X射线衍射 (PXRD) 监测的单晶到单晶 (SC-SC) 阶段转换.
- 在不同的温度和压力下进行气体吸附实验 (C2H2,CO2).
- 在现场差分扫描热度计 (DSC) 和在现场单晶X射线衍射 (SCXRD).
- 计算研究以了解客人运输机制.
主要成果:
- 合成了一个具有方格格子 (sql) 拓的协调网络和一个灵活的1,3-bis(1H-imidazol-1-yl) benzene (bib) 连接器.
- 在溶解和激活后,SC-SC转换导致具有可访问的闭孔 (sql-bib-Co-Cl-β) 的相.
- 在特定的压力下,sql-bib-Co-Cl-β通过门打开机制表现出乙烯 (C2H2) 与二氧化碳 (CO2) 的优先吸附.
- 灵活的带被确定为客人运输机制的关键.
结论:
- 该研究表明,客人通过在晶体固体中通过门打开机制进行客人运输,并具有暂时可访问的孔隙.
- 协调网络显示了C2H2在CO2上的选择性吸附,突出了其对气体分离的潜力.
- 胸罩连接器的角形和灵活性质在控制客人进入和运输方面发挥着关键作用.
更多相关视频
10:18Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
Published on: February 21, 2017
8.5K
06:45Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior
Published on: March 8, 2024
7.1K
相关概念视频
02:33Lattice Centering and Coordination Number
9.5K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
9.5K
02:18Network Covalent Solids
13.3K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
13.3K
02:57Coordination Number and Geometry
15.5K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
15.5K
02:37Metallic Solids
18.2K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.2K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
41.3K
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,...
41.3K
02:22Structures of Solids
14.0K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
14.0K