制限されたゲストは,自己組み立てたカプセルにリン酸化して転がる.
Steven Harthong1, Béatrice Dubessy, Jérôme Vachon
1Laboratoire de Chimie, École Normale Supérieure de Lyon, CNRS, 46 Allée d'Italie, F-69364 Lyon, France.
Journal of the American Chemical Society
|October 16, 2010
まとめ
ディフォスフォナトカビタンドは分子カプセルに自己組み立てられ,ゲストを捕まえます. これらの超分子ローターは,制限されたゲストの動きを示し,制御された分子ダイナミクスを実証します.
科学分野:
- 超分子化学 超分子化学
- 有機化学 オーガニック・ケミストリー
- マテリアルサイエンス 材料科学
背景:
- ディフォスフォナトカビタンドは自己組織化が可能である.
- 分子カプセルは,超分子組立によって形成される.
- 超分子組成は,ユニークなダイナミック特性を発揮することができます.
研究 の 目的:
- ディフォスフォナトカビタンドの2次元分子カプセルへの自己組み立てを調査する.
- これらのカプセル内のN-メチルピリジニウムおよびN-メチルピコリニウムゲストの封じ込みを調査する.
- 制限されたゲストの動きのために,超分子組立を分子ローターとして特徴付ける.
主な方法:
- クロロフォームで溶液状態の自己組み立て.
- 固体構造の決定のためのX線微分分析.
- 拡散オーダー光譜法 (DOSY) 溶液の研究のための核磁気共振 (NMR).
主要な成果:
- ディメリック分子カプセルは,クロロフォーム中のディフォスフォナトカビタンによって形成された.
- N-メチルピリジニウムおよびN-メチルピコリニウムゲストは,成功裏に投獄されました.
- X線 difraktionは,フリーホストとゲスト複合体の状態の両方でカプセル形成を確認しました.
- DOSY NMRは溶液中のカプセル形成の証拠を提供した.
- カプセル内のゲストの制限された回転が定量化され,より大きなピコリニウムゲストのエネルギーバリアが高くなりました.
結論:
- ディフォスフォナトカビタンドは,安定した二次元分子カプセルを効率的に形成します.
- 超分子カプセルは分子ローターとして機能し,ゲストの動きはゲストのサイズに依存します.
- カプセル形成はゲストの存在とは無関係で,ホストとホストの相互作用によって引き起こされます.
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