ポリマーのクロマトグラフィック分離を可能にする金属有機フレームワークによるポリマー末端の認識
Nagi Mizutani1, Nobuhiko Hosono1,2, Benjamin Le Ouay1
1Department of Advanced Materials Science, Graduate School of Frontier Sciences , The University of Tokyo , 5-1-5 Kashiwanoha , Kashiwa, Chiba 277-8561 , Japan.
Journal of the American Chemical Society
|February 11, 2020
まとめ
メタル・オーガニック・フレームワーク (MOF) は,ポリマー構造の高い認識を達成します. これにより,端末構造の大きさに基づく末端機能化されたポリマーの最初の染色学的な分離が可能になります.
科学分野:
- 材料科学
- ポリマー化学
- 分析化学
背景:
- 大きなポリマー鎖の微妙な違いを認識することは 伝統的な分子認識技術にとって 挑戦的です
- 高度な材料の応用には,高精度なポリマー構造の識別方法の開発が不可欠です.
研究 の 目的:
- 末端機能化されたポリマーの認識と分離における金属有機フレームワーク (MOF) の能力を実証する.
- MOFを用いたポリマー分析のための新しい染色法を確立する.
主な方法:
- 液体染色体 (LC) の静止相として金属有機フレームワーク (MOF) を利用する.
- 末端機能化されたポリエチレングリコール (PEG) のMOFチャネルへの選択的挿入を調査する.
- 端末構造のサイズに基づいてPEG挿入の運動を分析する.
主要な成果:
- MOFは,ポリマー端末構造に対する高い認識能力を示した.
- 末端機能化されたPEGの選択的挿入は,末端サイズに依存してMOFチャンネルに観察されました.
- 末端機能化されたポリマーのクロマトグラフィック分離は,MOF詰まったコラムを使用して成功しました.
結論:
- メタル・オーガニック・フレームワーク (MOF) は,ポリマー端末構造を効果的に認識し,区別することができます.
- このMOFベースのアプローチは,ポリマーの最初のクロマトグラフィック分離を可能にします.
- MOFで包装された列は,従来のLCシステムを使用してポリマー分析のための効率的でアクセシブルな方法を提供します.
関連する概念動画
01:13Olefin Metathesis Polymerization: Overview
2.5K
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...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
2.5K
01:03Affinity Chromatography
2.6K
Affinity chromatography is a powerful technique extensively utilized for separating and purifying specific biomolecules from complex mixtures. It capitalizes on the highly selective binding between an analyte and its counterpart, such as antibody-antigen interactions. The counterpart is immobilized on the stationary phase, forming an affinity column. The stationary phase typically consists of solid support, such as agarose or porous glass beads, immobilizing the affinity ligand. The mobile...
2.6K
01:17Ion Exchange
1.1K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.1K
00:56Extraction: Advanced Methods
1.0K
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
1.0K
01:16Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
3.0K
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...
3.0K