バイオインスピレーションによる液体対液体相分離による制御された超分子ポリメリゼーション
Satyajit Patra1, Sushmitha Chandrabhas1, Shikha Dhiman1
1New Chemistry Unit and School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore 560064, India.
Journal of the American Chemical Society
|April 29, 2024
まとめ
研究者らは,制御された超分子ポリメリゼーションのための休眠モノマーフェーズとして,メタステーブルなコアセルバートドロップルを用いた新しい方法を開発した. このアプローチは,バイオインスピレーションによる液体液相分離 (LLPS) による合成ポリマーの正確な構造制御を可能にします.
科学分野:
- 超分子化学
- ポリマー科学
- 材料科学
- バイオ材料工学
背景:
- ダイナミックな超分子組成は生物学の基礎であり,自己修復と適応特性を示す合成対称性がある.
- タンパク質の自己組み立てと液体-液体相分離 (LLPS) は,制御された合成超分子ポリメリゼーションの戦略をインスパイアします.
- 合成コアセルバートは,ダイナミックで膜のないフェーズとして合成生物学における役割を認識しています.
研究 の 目的:
- 合成高分子ポリマーにおける構造制御のための合成コアセルバートの新しい視点を導入する.
- 制御された超分子ポリメリゼーションのための休眠モノマーフェーズとして,メタステーブルなコアセルバートドロップルを利用する.
- 閉じ込められた環境で自己組み立て構造の精密合成を実現する.
主な方法:
- コアセルベーションのための末端イオン群と1次元成長のためのπ結合モノメアの設計.
- メタステーブルなコアセルバット滴に至る臨時液体液相分離 (LLPS) の調査.
- 段階進化と構造特性を研究するために,スペクトロスコーピーと顕微鏡を用いた特徴付け.
- 運動を制御し,生きた成長を達成するために,ドロップレット内のシードを適用する.
主要な成果:
- 休眠モノメール相として作用するメタステーブルなコアセルバート滴の実証
- コアセルバトドロップレット内の核形成と一次元成長の観察.
- 液体から固体への変容の運動をうまく調節し,高分子ポリマー構造を制御する.
- 種まき実験を通して生きた成長の特徴の証拠.
結論:
- メタステーブルなコアセルバートドロップルは,制御された超分子ポリメリゼーションのための新しいプラットフォームを提供します.
- π結合モノメールの設計は,一時的なLLPSと後の制御された成長を促進します.
- このアプローチは,限られた環境で精密な自己組み立てのための一般的な設計原理を提供し,合成生物学アプリケーションを拡張します.
関連する概念動画
01:03Step-Growth Polymerization: Overview
3.5K
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...
Many natural and synthetic polymers are produced by...
3.5K
00:57Cationic Chain-Growth Polymerization: Mechanism
2.3K
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...
2.3K
02:34Polymers
35.7K
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...
35.7K
01:04Anionic Chain-Growth Polymerization: Mechanism
2.0K
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...
2.0K
01:24Characteristics and Nomenclature of Copolymers
2.5K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
2.5K
01:08Molecular Weight of Step-Growth Polymers
2.2K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.2K