水中の非アンフィフィリックな集合体:多形性,糸構造,熱力学的不適合性

Lei Wu¹, Jyotsana Lal, Karen A Simon

¹Department of Chemistry, Syracuse University, Syracuse, New York 13244, USA.

Journal of the American Chemical Society

|May 9, 2009

まとめ

研究者らは,水溶性分子を設計し,その分子は自己組織化して液晶を形成する. この発見は,非アンフィフィリック分子組成と水溶液中の液晶形成に関する新しい洞察を提供します.

科学分野:

超分子化学超分子化学
マテリアルサイエンス材料科学
物理化学物理化学

背景:

水溶性分子の自己組み立ては,エントロピー的に難しい.
水中の非アンフィフィリック組成を理解することは,新しい材料の開発に不可欠です.

研究の目的:

非アンフィフィリック組立体とクロモニック液晶を形成できる水溶性アロマティック分子を設計・合成する.
水溶液における組立行動と液晶相形成を調査する.

主な方法:

新しい水溶性ダイクロモニル分子の合成.
二重断裂を用いた液晶相の特徴化.
小角中性子散射 (SANS) を用いて組立構造を決定する.
モノアニオン分子とダイアニオン分子を加えた効果を調査する.

主要な成果:

新しい分子である5'DSCG-diviolが合成され,大きな二重断裂相を示しています.
ノンアンフィフィリック・アセンブリとクロモニック液晶相は水の中で形成された.
SANSは,濃度に依存しない棒状の集合を明らかにした.
モノアニオンの分子は液晶相を乱し,ダイアニオンの分子はそれを保持した.

結論:

水中の非アンフィフィリック分子のための新しい組み立て構造,分子糸と呼ばれるものが提案されました.
これらの糸は,塩の橋で結ばれた小さな分子と,積み重ねられた芳香質のグループで構成され,強く水分化されています.
異なる分子を混合すると,熱力学的な不適合性のために新しい液晶または相分離が生じる可能性があります.

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