オクタピ相互作用:8倍pi相互作用によって誘発されるPdベースの [2]カタネンの自己組み立て
Jinzhen Lu1, David R Turner, Lindsay P Harding
1School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
Journal of the American Chemical Society
|September 3, 2009
まとめ
ユニークなpi相互作用配列は,機械的に相互接続された分子である [2]catenaneの作成を可能にします. リガンドの長さを変化させると,カテーネンの形成が妨げられ,分離したリングのみが生成されます.
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:
- カテネンは,ユニークな性質を持つ,機械的に相互に絡み合った分子構造である.
- Pi-pi相互作用は,分子組立における決定的な非共性力である.
- 複雑に絡み合った構造の形成を制御することは,依然として課題です.
研究 の 目的:
- [2]catenanes.の形成をテンプレートするにおけるpi-pi相互作用の役割を調査する.
- カテナンの合成に対するリガンド長さの影響を調査する.
- 溶液中の形成された連鎖複合体の安定性を特徴付けるために.
主な方法:
- アロマティックリガンドを用いた金属マクロサイクルの合成.
- PI-PIの相互作用によって駆動される自己組み立て.
- 構造と相互接続状態を確認するために,光譜および構造分析 (例えば,NMR,X線結晶学) を行う.
主要な成果:
- 8つのアロマティックリングと2.5nmのpi-pi相互作用の配列は, [2]catenane.の形成を成功裏にテンプレートしました.
- より長いリガンドを使用すると,π相互作用配列が破壊され,連鎖されていないリングの形成につながりました.
- [2]カテナンは溶液で安定しており,その前身である金属マクロサイクルと共存することが観察されました.
結論:
- pi-pi相互作用の幾何学に対する正確な制御は,カテネネンのような複雑な相互鎖の分子をテンプレートするために不可欠です.
- リンガンドの設計は,自己組織化の経路を連鎖化または単純なマクロサイクリングに導く上で重要な要因です.
- この研究は,非共性相互作用を介して機械的に相互に絡み合っている分子を構築し,安定させる方法を示しています.
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