キラル型ポリサイクル芳香炭水化物としてのπ-拡張ピレン溶融双 [7]炭水化物
Yunbin Hu1,2, Giuseppe M Paternò3, Xiao-Ye Wang1
1Max-Planck-Institut für Polymerforschung , Ackermannweg 10 , Mainz 55128 , Germany.
Journal of the American Chemical Society
|July 23, 2019
まとめ
溶融ピレンユニットを持つ新しいπ拡張カルボヘリケンは,近赤外線放射の強化と顕著なキラル安定性を表しています. この分子は高度なカイロプティカルデバイスの 応用の可能性を示しています
科学分野:
- 有機化学
- 材料科学
- フォト物理学
背景:
- ヘリケンは,螺旋構造の多循環性芳香炭水化物です.
- π拡張システムは,ユニークな光物理的特性を示すことができます.
- カーボヘリケンは 調節可能な電子と光学特性を有しています
研究 の 目的:
- 溶融ピレン単位でπ拡張された二重 [7]カルボヘリケンを合成し,特徴づけること.
- 吸収,放出,エクシマー形成を含む光物理学的性質を調査する.
- カイロプティックな応用の可能性を評価する.
主な方法:
- π拡張二重 [7]カルボヘリケンの合成
- 構造分析のためのX線結晶学.
- UV-Visの吸収と放射スペクトル
- フェムト秒間吸収スペクトロスコーピー
- 密度関数理論 (DFT) の計算
- 光学解像度のためのキラル高性能液体染色体 (HPLC)
主要な成果:
- 合成された化合物は,有意な分子内および分子間相互作用を示す.
- 化合物2は赤色シフト吸収 (645 nmで発生) と,基準化合物と比較してより小さな光学ギャップ (1.90 eV) を示しています.
- 広範囲の近赤外線放射 (600900 nm) と大きなストークスシフトは,分子内エクシマー形成を示す.
- 46 kcal mol−1 のイソメリゼーションバリアを持つ高いキラル安定性は,DFT計算によって決定された.
- キラルHPLCを用いた光学解像度は成功しました.
結論:
- 溶融ピレンユニットを持つπ拡張カルボヘリセンは,NIR放射を含むユニークな光物理的特性を有しています.
- この分子は優れたキラル安定性を示し,光学解像度を可能にします.
- この化合物は 手術装置や高度な材料の応用に 期待されています
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