一个多孔的晶体联共价有机框架
Daria Kurandina1, Banruo Huang2, Wentao Xu1
1Department of Chemistry and Kavli Energy Nanoscience Institute, University of California, Berkeley, Berkeley, CA, 94720, USA.
Angewandte Chemie (International ed. in English)
|July 13, 2023
概括
我们合成了一种新的联共价有机框架 (COF-115),具有大气水收集和二氧化碳捕获的潜力. 这种新的多孔材料,COF-115,也可以经历光诱导的重新排列.
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
- 纳米技术 纳米技术
背景情况:
- 聚合有机框架 (COF) 是具有可调节性质的晶体多孔聚合物.
- 基于氧化的材料对气体捕获和水资源采集具有前景.
- 开发新的COF架构对于推进材料科学至关重要.
研究的目的:
- 为了合成和表征一种新的联共价有机框架,COF-115.
- 评估COF-115在收集大气中的水和捕获二氧化碳方面的潜力.
- 为了研究COF-115的光诱导的重新排列.
主要方法:
- 在N,N',N',N''-(乙烯-1,1,2,2-四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四烯四二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二
- 固态13C核磁共振光谱和里埃变换红外光谱用于结构确认.
- 低压N2,CO2和H2吸附实验以评估孔隙性.
- 水蒸气和二氧化碳吸附分析.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 成功合成了与子结合的COF-115.5.
- 使用光谱技术证实了龙的功能.
- 在COF-115中证明了永久的多孔性.
- 优越的水蒸气和二氧化碳吸附能力,相比 imine-linked COFs.
- 由DFT计算提供的吸附性质的洞察力.
- 通过光学诱导成功地将COF-115重新排列成一种胺结合材料.
结论:
- 在大气水收集和二氧化碳捕获应用中,COF-115具有显著的潜力.
- 基于氧化的多孔材料为环境应用提供了优势.
- 光诱导的重新排列能力为COF功能添加了新的维度.
相关概念视频
02:18Network Covalent Solids
13.5K
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...
13.5K
01:28Structures of Carboxylic Acid Derivatives
2.7K
Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
2.7K
01:18Aromatic Hydrocarbon Anions: Structural Overview
2.8K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
Due to the absence of continuous...
2.8K
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
01:21Polymer Classification: Crystallinity
2.9K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.9K
03:02Organic Compounds
51.6K
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
51.6K