通过在金属有机框架内隔离连接体来芳香化烯转化
Nicolaas A Vermeulen1, Olga Karagiaridi, Amy A Sarjeant
1Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|September 20, 2013
概括
研究人员使用溶剂辅助的链接器交换和合成后修改在一个多孔的框架内创建SALEM-14. 然后将这种金属有机框架 (MOF) 转换为PAH-MOF-1,产生多环芳 (PAH) 柱.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术纳米技术
背景情况:
- 延伸的多孔框架为化学转化提供了独特的环境.
- 金属有机框架 (MOF) 可以在合成后功能化,以引入新的特性.
- 烯转化是碳-碳键形成的强大工具.
研究的目的:
- 为了研究一个扩展的多孔框架的催化潜力,用于芳香化环闭转化.
- 合成一个不透的MOF (SALEM-14) 并将其转化为含PAH的MOF (PAH-MOF-1).
- 在MOF结构中探索多环芳 (PAH) 的选择性形成和释放.
主要方法:
- 用于构建初始框架的 Solvent-assisted linker exchange (SALE) 是被采用的一种方式.
- 在SALEM-14框架下使用olefin转化进行了合成后修饰.
- 霍维达-格拉布斯催化剂被用于转化反应.
- 在二甲基硫化物中的酸性条件被用来释放PAH产品.
主要成果:
- 非相互透的SALEM-14框架已成功合成.
- 在SALEM-14的催化转化过程中,得到了PAH-MOF-1与多环芳碳化合物柱.
- MOF结构阻止了分子间的烯转化,有利于分子内循环.
- 多环芳碳水化合物成功地从框架中释放出来.
结论:
- 扩展的多孔框架可以容纳和指导复杂的化学反应,如芳香化环闭转化.
- SALEM-14 作为合成 PAH-MOF-1 的平台,展示了 SALE 和合成后修改的实用性.
- MOF架构在控制反应路径和允许选择性产品形成和释放方面发挥着至关重要的作用.
相关概念视频
Olefin Metathesis Polymerization: Overview
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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Properties of Organometallic Compounds
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Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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