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関連する概念動画

Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

4.8K
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...
4.8K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

3.1K
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...
3.1K
Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

3.9K
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...
3.9K
Formation of Halohydrin from Alkenes02:41

Formation of Halohydrin from Alkenes

15.2K
An alkene, such as propene, reacts with bromine in the presence of water to yield a halohydrin. Halohydrins contain a halogen and a hydroxyl group attached to adjacent carbons. When the halogen is bromine, it is called a bromohydrin, while a chlorohydrin has chlorine as the halogen.
15.2K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.6K
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...
2.6K

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Updated: Apr 15, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

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補完的なハロゲン結合ポリマーの溶液相自己組み立て

Alan Vanderkooy1, Mark S Taylor1

  • 1Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.

Journal of the American Chemical Society
|April 14, 2015
PubMed
まとめ
この要約は機械生成です。

非共性ハロゲン結合は,溶液中のマクロ分子自己組み立てを駆動する. 特定の機能群を持つポリマーは,高次元の構造に自己組み立てられ,様々な溶媒で定義されたコアを形成します.

さらに関連する動画

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

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関連する実験動画

Last Updated: Apr 15, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

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科学分野:

  • 超分子化学 超分子化学
  • ポリマーサイエンスの科学
  • 有機化学 オーガニック・ケミストリー

背景:

  • 非共振相互作用は,分子自己組み立てに不可欠である.
  • ハロゲン結合は,特定の非共性相互作用であり,マクロ分子組立を誘導する可能性がある.
  • 制御されたポリメリゼーション方法は,自己組み立てのための機能的なポリマーを作成するために必要です.

研究 の 目的:

  • 溶液中のマクロ分子自己組み立ての原動力としてのハロゲン結合を調査する.
  • ハロゲン結合ドナーモノメアの制御された根性ポリメリゼーションのための条件を開発する.
  • 相互作用するポリマーによって形成される自己組み立て構造を特徴付ける.

主な方法:

  • ヨドペルフローアレンを含むメタクリlateポリマーを合成するための制御された根性ポリメリゼーション.
  • ポリマーの相互作用と関連定数を研究するための光譜法 (NMR).
  • 顕微鏡 (TEM) とダイナミック・ライト・スキャタリング (DLS) を用いて,自己組み立て構造を分析する.

主要な成果:

  • ハロゲン結合ドナーモノメアの制御された根性ポリメリゼーションの条件を特定した.
  • モノメア種と比較して,ポリマー-ポリマー相互作用の強化された関連定数を観察した.
  • 有機溶剤と水中のブロックコポリマーを使用して,より高いレベルの自己組み立て構造の形成を実証しました.
  • ハロゲン結合ドナーと受容体セグメントの相互作用によって形成されたコアを持つ特徴的な構造.

結論:

  • 非共性ハロゲン結合は,溶液相マクロ分子自己組み立てを効果的に駆動する.
  • 設計されたポリマーは,特定の分子間相互作用を通じて,安定した,より高い階層の構造を形成することができます.
  • このアプローチは,多様な環境で機能的な超分子材料を作成するための経路を提供します.