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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
Published on: August 2, 2012
水分子によって支えられている管状水素結合ネットワーク
H Carrasco1, C Foces-Foces, C Pérez
1Departamento de Bioorgánica, Instituto de Investigaciones Químicas, CSIC, Américo Vespucio, s/n, Isla de la Cartuja, 41092 Seville, Spain.
Journal of the American Chemical Society
|November 29, 2001
まとめ
弱い分子間力を介して結晶の詰め込みトポロジーを制御することは,機能的な固体にとって鍵となる. ヒドロキシ酸の大量置換剤はテープやシートを形成し,水を使った柔軟置換剤は3Dチューブ状のネットワークを形成する.
科学分野:
- 超分子化学 超分子化学
- クリスタル・エンジニアリング (Crystal Engineering) とは
- 有機固体化学 オーガニック固体化学
背景:
- 機能的な固体の設計は,弱い分子間力を介して結晶のパッキングトポロジーを制御することに依存しています.
- 分子構成要素とステレオ化学が周期的集積形状に与える影響を予測することは,予測可能な結晶構造にとって極めて重要です.
研究 の 目的:
- ハイドロキシ酸 (+/-) -1の固体構造に対するステリック相互作用と置換剤の柔軟性の影響を調査する.
- 分子構造と水分化に基づいて異なる超分子組成 (テープ,シート,チューブ状ネットワーク) の形成を調査する.
主な方法:
- 一般的な構造 (+/-) - 1 と異なる置換物質を持つヒドロキシ酸の合成.
- 固体構造を特定するためのX線結晶学.
- 分子間相互作用の分析,特に水素結合とステリック効果.
主要な成果:
- 大量で硬い置換物 (1b,1eを除く) を含む化合物は,カルボキシル酸とアルコールの水素結合によって1Dテープと2Dシートを形成します.
- 化合物 (+/-) - 1nは,柔軟な置換物で,水を組み込み,六角形のチャネルを持つ3D管状のH結合ネットワークを形成します.
- より小さな置換剤は周期的積分を形成できず,無水 (+/-) - 1nがシートを形成し,管状構造における水の役割を強調しました.
結論:
- ステリック相互作用と置換剤の柔軟性は,ヒドロキシ酸結晶における上分子組成を大きく左右する.
- 水分子は,複雑な3D管状ネットワークの形成を可能にする上で重要な役割を果たします.
- この研究は,結果として得られる固体構造に分子設計が構造を制御する効果があることを示している.
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