超分子ポリマーの動的安定性に対するトポロジカルな影響
Atsuhito Suzuki1, Keisuke Aratsu1, Sougata Datta2
1Division of Advanced Science and Engineering, Graduate School of Engineering , Chiba University , 1-33 Yayoi-cho, Inage-ku , Chiba 263-8522 , Japan.
Journal of the American Chemical Society
|July 27, 2019
まとめ
メタステーブルな超分子ポリマーのトポロジカルな差異は,その動的安定性に大きく影響する. サイクリングされたポリマーは開いたものよりも安定性があり,熱力学的構造に制御された変換を可能にします.
科学分野:
- 超分子化学
- ポリマー科学
- 材料科学
背景:
- メタステーブルな分子組成は,超分子ポリマー研究において極めて重要です.
- 類似の超分子モチーフの運動安定性を区別することは困難です.
- トポロジカルバリエーションはアセンブリダイナミクスに影響を与える.
研究 の 目的:
- メタステーブルな超分子ポリマーの動的安定性に対するトポロジック効果を調査する.
- サイクリングとオープンエンドの超分子ポリマーの間の動的安定性を区別する.
- 熱力学的に安定した構造に制御された変換を 探求する.
主な方法:
- 非極性溶媒におけるアゾベンゼンを含むモノマー混合物の形成
- 運動と熱力学的組成を誘導するための熱処理.
- 原子力顕微鏡 (AFM) で,分子組成を直接可視化する.
- 光誘導による構造変化で 探査機の動的安定性を確認した
主要な成果:
- サイクリングされたおよび開いたトポロジーを持つ超分子ポリマーの運動的に形成された複雑な混合物が生成されました.
- 熱力学的に安定した歪んだ繊維は,さらなる加熱で得られた.
- サイクルされた超分子ポリマーは,オープンエンドの同類と比較して,熱変換に対する優れた運動安定性を示した.
- 光誘導による開口は,熱力学的な構造に転移した.
結論:
- トポロジーは,メタステーブルな超分子ポリマーの運動安定性を決定する上で重要な役割を果たします.
- サイクリングされた構造における集合端末の欠如は,その運動的安定性を高めます.
- 制御された光誘導変換は 超分子ポリマー状態を操作するための経路を提供します
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