金属-有机框架-衍生格尔贝特催化剂有效区分乙醇和butanol
Constanze N Neumann1, Steven J Rozeveld2, Mingzhe Yu2
1Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States.
Journal of the American Chemical Society
|October 23, 2019
概括
在金属有机框架 (RuNi@MOF) 中,高活性纳米颗粒以极高的效率催化乙醇升级为1-butanol. 这种新型催化剂在1-butanol生产中具有99%以上的选择性.
科学领域:
- 催化剂
- 材料科学
- 有机化学
背景情况:
- 格尔贝特反应对于将酒精转化为更高价值产品至关重要.
- 开发高效和选择性催化剂用于酒精升级仍然是可持续化学的一个重大挑战.
- 金属有机框架 (MOF) 为催化剂支持和设计提供可调节的特性.
研究的目的:
- 开发一种高活性和选择性催化剂,用于乙醇与1-butanol的格尔贝反应.
- 在金属有机框架 (RuNi@MOF) 上研究-纳米颗粒的性能.
- 为了实现1-butanol合成的高选择性,尽量减少副产品的形成.
主要方法:
- 在基金属有机框架 (MOF) 中封装的-纳米颗粒 (RuNi) 在现场形成.
- 使用RuNi@MOF复合物作为Guerbet反应的异质催化剂.
- 使用气相色谱对催化剂的活性和选择性的描述.
主要成果:
- 对于格尔贝反应,RuNi@MOF催化剂表现出异常高的活性,每个原子的循环数达到725,000个.
- 催化剂在从乙醇中生产1-butanol方面表现出极好的选择性 (>99%).
- 对1-butanol的微不足道的催化作用确保了产品的高纯度.
结论:
- 在金属有机框架 (RuNi@MOF) 上支的纳米粒子代表了格尔贝反应的高效催化系统.
- 这种催化剂可以从乙醇中有效和高度选择性地合成1-butanol,这是一个关键的中间体.
- 现场形成和MOF封装策略为先进的异质催化提供了一个强大的平台.
相关概念视频
Hydroboration-Oxidation of Alkenes
10.9K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
10.9K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.8K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.8K
Catalysis
30.0K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
30.0K
Olefin Metathesis Polymerization: Overview
2.5K
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...
2.5K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
9.4K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
9.4K
Preparation of Alcohols via Addition Reactions
7.2K
Overview
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
7.2K


