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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

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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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Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

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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...
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Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.0K
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...
2.0K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

2.4K
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this...
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Radical Chain-Growth Polymerization: Overview01:10

Radical Chain-Growth Polymerization: Overview

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Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...
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Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Author Spotlight: Exploring Self-Assembled MOF-Polymer Composites
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在金属有机框架内的道导向酶去聚合.

Jana Glatz1, Jesús Cases Díaz1, Jorge Salinas-Uber1

  • 1Universidad de Valencia - Instituto de Ciencia Molecular, Catedrático José Beltrán Martínez 2, 46980 Paterna, Spain.

ACS applied materials & interfaces
|May 1, 2025
PubMed
概括

研究人员开发了一种新的方法来培养用于生物催化物的金属有机框架 (MOF). 这种技术可以有效地封装酶,并改善使用MOF支架的酶去聚合反应.

关键词:
生物催化剂的生物催化剂生物复合物 生物复合物酶性脱聚合酶化的过程在现场封装封装.金属有机框架结构.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 生物催化剂是一种生物催化剂.
  • 纳米技术纳米技术

背景情况:

  • 在温和的条件下,金属有机框架 (MOF) 的受控生长使混合生物复合物能够用于生物催化.
  • 虽然维护了酶结构和生物活性,但在多孔MOF中进行质量传输仍然是一个挑战.

研究的目的:

  • 开发一种可扩展和生物相容的方法,以可访问的道合成MIL-110(Al) MOF.
  • 为了在MOF结构中实现有效的in situ酶封装.
  • 为了增强使用MOF保护性支架的酶去聚合反应.

主要方法:

  • 一种可扩展和生物相容的合成过程,用于相位纯三聚酸盐多孔框架,MIL-110(Al).
  • 通过路易斯酸介导的矿化与受控的蛋白质加载进行现场酶封装.
  • 使用模型生物复合材料,xylanase@MIL-110(Al) 来证明通道导向的脱聚合.

主要成果:

  • 通过可访问的微孔通道成功合成了MIL-110 (((Al).
  • 在in situ酶封装过程中高效率和受控的蛋白质负载.
  • 在连续的循环中,通过xylanase@MIL-110(Al) 优化基兰聚合物的通道导向脱聚合.

结论:

  • 开发的MOF合成和酶封装方法是生物相容,可扩展和高效的.
  • 具有可访问的多孔性的MIL-110(Al) 支架可以在脱聚合反应中提高整体酶性能.
  • 这种方法为先进的生物催化应用提供了一个有前途的战略.