溶性,末端機能化されたポリエネとポリアセチレンブロックコポリマーの直接合成
Oren A Scherman1, Isaac M Rutenberg, Robert H Grubbs
1Arnold and Mabel Beckman Laboratories for Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
Journal of the American Chemical Society
|July 10, 2003
まとめ
環開きメタテシスによるサイクロオクタテトレーン (COT) のチェーントランスファー剤 (CTA) によるポリメリゼーションにより,溶性ポリエネとポリアセチレンブロックコポリマーが得られます. この方法は,多数の二重結合を持つ機能化されたポリマーの制御された合成を可能にします.
科学分野:
- ポリマー化学のポリマー化学について
- オーガニック・シンセシス オーガニック・シンセシス
- マテリアルサイエンス 材料科学
背景:
- リングオープニングメタテシスポリメリゼーション (ROMP) は,ポリマー合成のための強力な技術です.
- サイクロオクタテトラエネ (COT) は,ROMPに適したサイクルオレフィン単体である.
- ポリマーのアーキテクチャと機能を制御することは,先進的な材料にとって極めて重要です.
研究 の 目的:
- COTのROMPを使用して,溶性ポリエネとポリアセチレンブロックコポリマーを合成する.
- ポリマー構造に対する小分子およびポリマー鎖移転剤 (CTA) の影響を調査する.
- 様々な分析技術を用いて,生成されたポリマーを特徴付ける.
主な方法:
- 1,3,5,7-サイクロオクタテトラエネ (COT) のリング開きメタテシスポリメリゼーション (ROMP) です.
- ルテニウムオレフィンメタテシス触媒とチェーントランスファー剤 (CTA) を利用した.
- 1HのNMR,UV/vis,FT-IR,MALDI-TOF MS,AFMによる特徴付けを行っています.
主要な成果:
- CTAsの存在下でCOT ROMPから溶性ポリエンの形成.
- 小分子CTAを用いて,最大20の二重結合を持つ溶性テレケリックポリエンの合成.
- ポリアセチレンブロックコポリマーの製造には,オレフィン末端のポリマーCTAを使用する.
結論:
- CTAsとCOTのROMPは,溶性ポリエネとブロックコポリマーへの多用途な経路を提供します.
- CTAの選択は,ポリマー構造を決定し,テレケリックまたはブロックコポリマー形成を可能にします.
- 合成されたポリマーには,材料科学における多様な応用の可能性があります.
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