上級カスケード環開閉メタテシスポリメリゼーションと多重オレフィンメタテシスポリメリゼーション:挑戦的なモノメアの成功的なポリメリゼーションのための推進力を強化する
Ho-Keun Lee1, Jaeho Lee1, Johannes Kockelmann1
1Department of Chemistry , Seoul National University , Seoul 08826 , Korea.
Journal of the American Chemical Society
|August 1, 2018
まとめ
新しいモノメアはオレフィン転移ポリメリゼーションを強化し,カスケードポリメリゼーションと多重オレフィン転移ポリメリゼーション (MOMP) の効率と範囲を高めます. これは以前の制限を克服し,制御が改善された明確に定義されたポリマーを可能にします.
科学分野:
- ポリマー化学
- 有機合成
- 材料科学
背景:
- 以前のポリメリゼーション方法であるカスケードポリメリゼーションと多重オレフィンメタテシスポリメリゼーション (MOMP) は,効率とモノメアの範囲に制限がありました.
- 既存の方法は低ターンオーバー数 (TON) を有しており,望ましくない副作用のために特定のモノマータイプに制限されていました.
研究 の 目的:
- 既存のポリメリゼーションの限界を克服する.
- ポリメリゼーションの効率を高め,カスケードポリメリゼーションとMOMPの範囲を広げる新しいモノマーを設計する.
- 熱力学的に好ましいポリマーバックボーンを達成し,副作用を抑制します.
主な方法:
- サイクロプテンとサイクロヘクセンを含むサイクロアルケンの分子を備えた新しいモノメアの設計と合成.
- これらのモノマーをカスケードポリメリゼーションおよびワンショット多重オレフィン転移ポリメリゼーション (MOMP) で適用する.
- リング開閉と交差メタテシス反応を利用した.
主要な成果:
- 最大TON 1940と最大分子量 (Mn) 343 kDaのカスケードポリメリゼーション効率を大幅に向上させました.
- 新しいモノマーでワンショットMOMPを成功裏に実行し,高い選択性を持つ高度なA,B交代コポリマーを生成しました.
- 新しく設計されたモノメアは望ましくないポリメリゼーション経路を抑制し,欠陥を軽減し,改善されたポリマーマイクロ構造をもたらしました.
結論:
- 開発されたモノメアは,優れたカスケードポリメリゼーションとMOMPを達成するための強力な戦略を提供します.
- 強化された熱力学的推進力と制御された運動的好みは,オレフィン転移ポリメリゼーションの限界を克服する鍵です.
- この研究は,正確なマイクロ構造を持つ明確に定義されたポリマーを作成するためのメタテシスポリメリゼーションの有用性を拡張します.
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