溶媒がゲスト結合に与える影響とFe(II) 4L4ケージのダイナミクス
Jeanne L Bolliger1, Tanya K Ronson, Masahiro Ogawa
1Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom.
Journal of the American Chemical Society
|September 17, 2014
まとめ
この研究では,溶媒に基づいてサイズと結合の好みを調整する柔軟な鉄の調整ケージを提示しています. 大きな分子を封じ込めることができ,不利な形状を持つものも封じ込めることができ,調節可能なホスト-ゲスト化学を実証します.
科学分野:
- 超分子化学 超分子化学
- 協調化化学について
- ホスト・ゲスト・ケミストリー
背景:
- 自己組み立てコーディネーションケージは,分子認識のためのユニークな環境を提供します.
- ソリューションにおけるホスト・ゲストの相互作用を制御することは,依然として課題です.
- 適応性のあるケージは,固い宿主構造の限界を克服することができます.
研究 の 目的:
- 調節可能なホスト・ゲスト化学のための溶剤対応の調整ケージを開発する.
- 不適格な形状を持つものを含む,多様なゲスト分子の封じ込みを調査する.
- ゲストの形状の変化を誘発するケージの能力を探求する.
主な方法:
- 自己組み立て Fe(II) 4L4 調整ケージの合成と特徴付け.
- 水とアセトニトリルにおける溶解性に関する研究は,カウンター試験に基づいています.
- 様々なアロマティック・アリファティック・ゲストを用いた定量結合研究.
- 変温核磁共振 (VT-NMR) スペクトロスコーピーは,ケージの柔軟性を研究する.
主要な成果:
- Fe(II) 4L4ケージは,溶媒に依存した溶解性とゲスト選択性 (水対アセトニトリル) を表しています.
- アロマティックとアリファティックの両方のゲストは水に結合し,アリファティックゲストだけがアセトニトリルに結合する.
- ケージの柔軟な構成要素により,拡大/収縮が可能で,小規模と大規模のゲストを収容できます.
- 封じ込められた大きなゲストは,熱力学的に有利でない形状を採用します.
- 檻のキラルな内部は,ゲストの陽子信号を区別することができます.
結論:
- 適応型のFe(II) 4L4調整ケージは,溶媒の影響による調節可能な宿主-ゲストの化学反応を示しています.
- 檻の柔軟性は,ゲストに対する強い結合と形状制御を可能にします.
- このシステムは,反応性の高い超分子材料を設計するための新しい可能性を提供します.
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