分子結晶マイクロリボンの可逆光誘導による歪み
Lingyan Zhu1, Rabih O Al-Kaysi, Christopher J Bardeen
1Department of Chemistry, University of California, Riverside, Riverside, California 92521, United States.
Journal of the American Chemical Society
|July 14, 2011
まとめ
9-アントラセネ・カルボキシル酸のオリエンテッド・クリスタリン・マイクロリボンは,光への曝露時に逆転的に回転する. 分子結晶におけるこの新しい光誘導運動は,新しい光機械的アクチュエータを可能にするかもしれない.
科学分野:
- 材料科学 材料科学とは
- フォトケミストリー フォトケミストリー
- クリスタログラフィーです.
背景:
- 9-アントラセネカルボキシル酸は,可逆的な [4 + 4] 光分解を起こすことが知られている.
- 分子結晶は,光に反応する材料の可能性を秘めています.
研究 の 目的:
- 9-アントラセネカルボキシル酸のオリエンテッド結晶マイクロリボンの光誘発運動を調査する.
- リバーシブルトウィスティングの行動とその基礎となるメカニズムを特徴づける.
主な方法:
- 9-アントラセネカルボキシル酸のオリエンテッド結晶マイクロリボン製剤.
- 均一な光照射にさらされ,回転運動の観察.
- 原子力と光学顕微鏡を用いた回転周期と尺寸の測定.
主要な成果:
- フォトリアクティブリボンには,光に曝されたときに急速な歪みが見られた.
- 歪みは逆転し,リボンは光を取り除いた後数分以内に元の形にリラックスしました.
- 光誘導運動は,複数のサイクルで繰り返される.
- モノマーとダイマー領域の間の界面ストレンは原因として特定され,相互作用エネルギーは約3.4kJ/molでした.
結論:
- 分子結晶における新しいタイプの可逆光誘導運動を実証した.
- リバーシブルな回転メカニズムは,インターフェイスのストレスを伴う.
- この現象は,新しい光力学アクチュエータの開発に有望である.
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