曲った棒の分子の自己組織化により,六角形に並んだ膀状の柱に編成される
Ho-Joong Kim1, Feng Liu, Ja-Hyoung Ryu
1Center for Supramolecular Nano-Assembly and Department of Chemistry, WCU Program of Chemical Convergence for Energy and Environment, Seoul National University, Seoul 151-747, Korea.
Journal of the American Chemical Society
|July 26, 2012
まとめ
キラル型デンドロンを持つ曲がった形状の分子は,独自の管状および柱状の構造に自己組み立てます. これらの固形柔軟性化合物は,固体状態で膀状のチャンネルを形成し,溶液の振る舞いとは異なる.
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
- 有機化学 オーガニック・ケミストリー
背景:
- 柔軟なサイドチェーンを持つ固い核の分子は,自己組み立ての鍵です.
- デンドロンは独特の構造的,機能的特性を有しています.
- 分子自己組み立ての制御は,高度な材料の設計に不可欠です.
研究 の 目的:
- 柔軟なキラル型デンドロンを持つ曲った形状の硬核分子を合成し,特徴づけること.
- 溶液と固体状態におけるこれらの分子の自己組み立て行動を調査する.
- 新しい超分子構造の形成とその性質を探求する.
主な方法:
- 曲った形状の硬核分子とキラル型デンドロンの合成.
- 円形の二重化,微分スキャニング熱計,X線散射,伝送電子顕微鏡を用いた特徴付け.
- 水溶液と固体状態での自己組み立ての分析.
主要な成果:
- ニトリル基を持つ分子は溶液中に空洞の管状構造を形成し,それのない分子は集積を示さなかった.
- 固体状態では,ニトリル基を持たない分子が2Dの斜め柱状構造を形成した.
- ニトリル基を持つ分子は,弱い3D秩序を持つ六角形の柱状構造を形成し,デンドロンで満たされた膀状のチャネル構造を示しています.
結論:
- 曲った形状の固形柔軟分子には,溶液と固体状態で異なる自己組み立て行動が表れます.
- ニトリル基の存在は,自己組織化経路と結果として生じる構造に大きな影響を与える.
- 新規の膀状の二重分離した柱状構造が発見され,超分子設計の新たな可能性が生まれました.
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