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関連する概念動画

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...
3.2K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

3.8K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
3.8K
Actin Polymerization01:42

Actin Polymerization

8.6K
Actin polymerization occurs through the head-to-tail association of binding sites on monomeric actin or G-actin to form filamentous or F-actin. The polymerization can be divided into three phases ̶  nucleation, elongation, and steady-state phase.
The nucleation phase involves forming a stable nucleus consisting of three actin monomers to form a new actin filament. Actin-binding proteins such as formins and Arp2/3 complex help filament growth post-nucleation. The Formins form straight...
8.6K
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

4.4K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
4.4K
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.6K
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...
2.6K
Actin Polymerization and Cell Motility01:13

Actin Polymerization and Cell Motility

6.6K
Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
6.6K

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関連する実験動画

Updated: Jan 28, 2026

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
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Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes

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リング開封ポリメリゼーションによるイソソルビド基ポリエッターの建築制御

Derek J Saxon1, Mohammadreza Nasiri1, Mukunda Mandal1

  • 1Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States.

Journal of the American Chemical Society
|March 6, 2019
PubMed
まとめ

研究者らは糖系物質であるイソソルビドの 制御されたポリメリゼーション方法を開発した. この突破により 持続可能な構造から 線形構造や循環構造を含む 多様なポリマー構造が作れます

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Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications
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Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications

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Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
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Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization

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関連する実験動画

Last Updated: Jan 28, 2026

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
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Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes

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Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications
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Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications

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Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
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科学分野:

  • ポリマー化学
  • 持続可能な材料科学
  • 有機合成

背景:

  • イソソルビドは 糖分から作られた固い分子で 高性能材料の可能性を秘めています
  • イソソルビドの制御されたポリメリゼーション方法は限られており,その広範な適用を妨げています.
  • 効率的なポリメリゼーション技術の開発は,イソソルビドの材料の潜在能力を解き放つために不可欠です.

研究 の 目的:

  • キャンセルされたイソソルビド誘導体に対するリング開きポリメリゼーション (ROP) のメカニズム的洞察を調査する.
  • イソソルビド誘導体の制御されたポリメリゼーション方法を確立する.
  • イソソルビドから設計された構造を持つポリマーの合成を可能にする.

主な方法:

  • カチオンおよび準ズウィテリオン環開きポリメリゼーション (ROP) のメカニズム研究.
  • 三環イソソルビド誘導体 (1,4:2,5:3,6-トリアンヒドロ-d-マニトール) の選択的リング開封
  • 線形またはサイクルポリマーを生成するマクロモレキュラー構造の制御

主要な成果:

  • トリサイクルエーテルの選択的リング開封を達成しました.
  • ポリメリゼーションの制御を証明し,線形および周期的なポリマー構造の形成を指示した.
  • 効率的なモノマーリサイクリングをスブライマーションで示した.

結論:

  • ROPを使用してイソソルビドからカスタマイズされたポリマーアーキテクチャのための最初のプラットフォームを確立しました.
  • 再生可能資源から新しい高性能材料を開発するための基盤を提供します.
  • 先進的なポリマーの構成要素としてのイソソルビドの汎用性を強調する.