催化聚合物化一个易斯基稳定素
Jens Braese1, Felix Lehnfeld1, Vincent T Annibale2
1Universität Regensburg, Institut für Anorganische Chemie, 94053, Regensburg, Germany.
Chemistry (Weinheim an der Bergstrasse, Germany)
|July 27, 2023
概括
一个新的催化聚合一个易斯基稳定酸单体产生高摩尔质量聚酸材料. 这种高效的方法在温和条件下运行,为先进的聚合物合成提供了一条新途径.
科学领域:
- 有机金属化学 有机金属化学
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
背景情况:
- 易斯基稳定酸单体是无机聚合物合成中的有价值的前体.
- 开发这些化合物的高效聚合方法对于获得先进材料至关重要.
- 过渡金属催化提供了受控聚合的潜力.
研究的目的:
- 开发一种新且高效的高摩尔质量聚酸的合成途径.
- 研究使用特定的复合物作为这种聚合物的催化剂.
- 探索这种前所未有的聚合物的基质范围和潜在机制.
主要方法:
- 使用催化剂量 bis ((η5:η1-adamantylidenepentafulvene) (1) 的 tBuHPBH2NMe3 (2a) 的聚合.
- 在20°C的托卢中进行反应,持续1小时.
- 由此产生的多素 [tBuPH-BH2]n (3a) 的表征.
主要成果:
- 成功合成具有高摩尔质量的多素[tBuPH-BH2]n (3a).
- 在温和的条件下 (20°C,1小时) 聚合物有效地进行.
- 这代表了易斯基稳定13/15组化合物的过渡金属介导聚合的第一个例子.
结论:
- 催化复合物能够方便快速地通往高摩尔质量聚酸矿.
- 开发的方法可以在可访问的条件下获取有价值的材料.
- 这项工作为基于13/15组元素的功能聚合物的合成开辟了新的途径.
更多相关视频
![Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F51444.jpg&w=3840&q=50)
11:44Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions
Published on: March 20, 2014
25.5K
09:08A Simple and Efficient Protocol for the Catalytic Insertion Polymerization of Functional Norbornenes
Published on: February 27, 2017
10.5K
相关概念视频
00:57Cationic Chain-Growth Polymerization: Mechanism
2.4K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.4K
01:15α-Bromination of Carboxylic Acids: Hell–Volhard–Zelinski Reaction
3.1K
The method to achieve α-brominated carboxylic acids using a mixture of phosphorus tribromide and bromine is known as the Hell–Volhard–Zelinski reaction. The reaction is catalyzed by phosphorus tribromide, which can be used directly or produced in situ from red phosphorus and bromine. The mechanism comprises PBr3 catalyzed conversion of acid to acid bromide and hydrogen bromide. The acid bromide enolizes to its enol form in the presence of HBr. The nucleophilic enol attacks the...
3.1K
03:08Hydroboration-Oxidation of Alkenes
8.4K
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.
8.4K
01:17Ziegler–Natta Chain-Growth Polymerization: Overview
3.4K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.4K
01:13Olefin Metathesis Polymerization: Overview
2.2K
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...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.2K
01:04Anionic Chain-Growth Polymerization: Mechanism
2.1K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
2.1K