非対称な配列反応のためのキラル調整ケージの設計と組み立て
Jingjing Jiao1, Chunxia Tan1, Zijian Li1
1School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , Shanghai 200240, China.
Journal of the American Chemical Society
|January 19, 2018
まとめ
研究者はアシンメトリックな触媒のためのキラル調整ケージを設計した. 混合リンカーケージは,反応物質の濃度と安定化により,連続反応を効率的に触媒化し,活性とエナチオ選択性を示した.
科学分野:
- 超分子化学
- 協調化学
- 非対称な触媒
背景:
- 多数の触媒部位を持つ超分子ナノ炉は,非対称な触媒作用には不可欠であるが,合成は困難である.
- キラルメタロサレン複合体は,触媒的な応用の可能性を備えています.
研究 の 目的:
- シングル・リンカーとミックス・リンカーの四面体協調ケージの設計と組み立て
- 超分子ナノ原子炉の触媒活性を調べるため
主な方法:
- 5つのキラルコーディネーションケージの合成は,エナティオプア Mn (塩素),Cr (塩素),Fe (塩素) とCp3Zr3クラスターからの二酸化炭素リガンドを使用する.
- 単結晶/粉末X線微分法,ICP-OES,Q-TOF MS,EDXを用いた特徴付け
- 連続した非対称アルケンのエポキシド化/エポキシド環開き反応における触媒性能の評価
主要な成果:
- ナノスケールの水害性空洞を備えた5つのキラル調整ケージの組み立てに成功しました.
- 効率的な超分子触媒としての混合結合器のケージ (Mn{\salen}/Cr{\salen}) の実証
- 連続的な非対称反応では,最大99. 9%のエナチオ選択性 (ee) を達成した.
- 自由な触媒と比較して,強化された活性とエナチオ選択性が観察されました.
結論:
- 開発された調整ケージは,非対称な触媒のための効果的な超分子ナノ反応器として機能します.
- 活性部位を安定させ,空洞内の反応物質を濃縮することで,触媒の性能が向上する.
- オーガニックリンカーの設計は 新しく機能的な超分子構造を 設計するための道筋を提供します
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