螺旋式で固定されたツィスタセネ
Anjan Bedi1, Linda J W Shimon2, Ori Gidron1
1Institute of Chemistry , The Hebrew University of Jerusalem, Edmond J. Safra Campus , Jerusalem 91904 , Israel.
Journal of the American Chemical Society
|June 16, 2018
まとめ
電子と光学特性の歪み効果を研究するために 安定したキラル分子を開発しました これらの分子は,高度な材料のエナチオピュアヘリコビルの構成要素として潜在性を示しています.
科学分野:
- 有機化学
- 材料科学
- フォト物理学
背景:
- 線形アセンの歪みは電子/光学特性を変化させ,キラリティを誘導する.
- 変形効果と置換効果を区別するのは難しい.
- 多くの歪んだアセン (twistacenes) は溶液でラセミゼーションし,その使用を制限する.
研究 の 目的:
- アセンの電子的および光学的性質に対する回転の影響を体系的に調査する.
- ラセミゼーションに抵抗する 安定した 純粋なツイスタセンを 開発する
- これらの分子の可能性を探求する.
主な方法:
- 変形角度を持つ対角的に結合されたアントラセンの誘導体 (twistacenes) の合成.
- 電子的および光学的性質の変化を監視するために,光譜分析 (吸収,光)
- エナティオメリックに純粋な化合物の分離と,そのカイロプティック特性と安定性の評価.
主要な成果:
- 吸収スペクトルのバトクロミックシフトを引き起こした.
- 光量子効率は 歪みが増えると著しく低下した.
- 縛られたツィスタセンは,強力なカイロプティック特性 (高g値) を有するエナティオプア形式として分離された.
- 合成されたトウィスタセンは,長時間加熱しても,驚くべき安定性を示す.
結論:
- 斜線結合は,アセンの回転角度を制御し,その性質を体系的に研究するための方法を提供します.
- 合成されたトビスタセンは安定した,エナティオプアヘリカルな構造です.
- これらの安定したキラル分子は,π結合系におけるエナティオプアヘリカル構造単位として応用が期待できる.
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