フォトレスポンシブな鍵で動作する自己ロック分子
Takahiro Muraoka1, Kazushi Kinbara, Takuzo Aida
1Department of Chemistry and Biotechnology, School of Engineering, and Center for NanoBio Integration, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Journal of the American Chemical Society
|August 31, 2006
まとめ
この研究は,分子宿主における可逆的な自己鎖メカニズムを示しています. ホストはホストです.
科学分野:
- 超分子化学 超分子化学
- 協調化化学について
- フォトケミストリー フォトケミストリー
背景:
- ロータリーホスト1はフェロセンのユニットを特徴とし,分子内Zn-N協調によって構成的にロックされています.
- この内部鎖は,亜鉛ポルフィリンとアニリン単位間のアポラー溶剤で発生する.
研究 の 目的:
- ロータリーホスト1と1,2-bispyridylethylene (2) の同位体間のホスト-ゲストの相互作用を調査する.
- 光化学的イソメリゼーションによって制御される可逆的な自己ロック操作を実証する.
主な方法:
- 形状の変化を視覚化するために,円形の二重化 (CD) スペクトロスコーピーを利用しました.
- 1,2-bispyridylethylene (cis-2およびtrans-2) の cisおよびtransイソメールをゲストとして使用した.
- ホストのロック状態を制御するために,ゲスト分子の光化学的イソメリゼーションを調査しました.
主要な成果:
- シス同位体 (cis-2) は,宿主の内部協調結合を容易に割って,外部にロックされた複合体を形成します.
- トランス同位体 (トランス-2) は内部鎖を破壊せず,異なる結合親和性を示す.
- cis-2からtrans-2への光化学的イソメリゼーションにより,ゲストが解放され,内部ロックが復元されます.
- ホストの存在下でtrans-2からcis-2への光化学的異体化により,外部ロックが誘発されます.
結論:
- 分子システムにおける可逆自閉操作を実証した.
- 超分子組立におけるゲストイソメリズムと光化学制御の重要な役割を強調した.
- 光に反応する分子機械とスイッチの潜在能力を示した.
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