構造とゲスト吸収の化学的制御は,形状的に移動性のある多孔性物質によって行われます
Alexandros P Katsoulidis1, Dmytro Antypov1, George F S Whitehead1
1Department of Chemistry, University of Liverpool, Liverpool, UK.
Nature
|January 11, 2019
まとめ
柔軟な金属有機フレームワーク (MOF) は,ペプチドリンクナーを回転させることで複数の結晶構造を採用することができます. この形状の変化は,不活性なMOFを活性化させ,ゲスト吸収に対する化学的制御を可能にします.
科学分野:
- 材料科学
- 化学について
- クリスタルグラフィー
背景:
- メタル・オーガニック・フレームワーク (MOF) は,吸収と触媒の用途を持つ多孔性材料です.
- 固いMOFは,複数のメタステーブル構造をナビゲートするタンパク質とは異なり,単一のエネルギー最小値を持っています.
- 柔軟なMOFは,タンパク質の構造的柔軟性と同様のダイナミックな構造変化の可能性を提供します.
研究 の 目的:
- 柔軟なMOFは,リンク器の形状の変化によって複数の結晶構造を示すことができると示す.
- MOF結合体における構造変化を誘導することによって,ゲスト吸収の化学的制御を調査する.
- フレキシブルなMOFの複数最小構成のエネルギー環境を明らかにする.
主な方法:
- 柔軟なMOFをペプチドリンクナーで合成した.
- 9つの異なる結晶構造を特定するために X線 difraktion を利用しました.
- ペプチド構造の変化の化学誘導によって誘発された小分子ゲスト吸収.
主要な成果:
- ペプチドリンカーにおける共性結合の回転により,9つの異なる結晶構造が生じた.
- MOFは複数の構造的最小値を持つ構造的エネルギー景観を示しています.
- 化学的に誘発されたペプチドの形状の変化は,ゲストの吸収活動を調節した.
結論:
- 柔軟なMOFは複数のメタステーブル構造を有し,コンフォメーションエネルギーランドスケープを形成する.
- リンカーの形状を化学的に制御することで,毛穴の幾何学と表面の化学を調整できます.
- このアプローチは,応答性のあるオープンフレームワークの材料を設計するための新しい経路を提供します.
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