分子単一結晶におけるリガンド交換と選択的触媒水素化
Zheng Huang1, Peter S White, Maurice Brookhart
1Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
Nature
|June 4, 2010
まとめ
単一結晶は稀な変化を経験しますが,この研究では,リガンドを交換する無傷のイリジウム複合結晶が示されています. これは,水素化のような固体内の選択的触媒を可能にします.
科学分野:
- 固体化学 固体化学
- オーガノメタリック化学
- カタリシス カタリシス カタリシス
背景:
- 単結晶から単結晶 (SC-SC) への変換は,原子再配置後に結晶性を維持する難しさのために珍しい.
- 既存のSC-SC変換は,主に多孔性物質や有機結晶の光誘導反応で起こります.
- 金属-リガンド結合の変化を含む無孔分子無機または有機金属結晶のSC-SC変換はまれである.
研究 の 目的:
- ピンサー・イリジウム (イリジウム) 複合体の分子単結晶におけるSC-SC変換の一連の報告.
- 完ぺきな単一結晶内のイリジウムセンターでのリガンド交換反応を実証する.
- 不孔の分子結晶内の選択的触媒を明らかにするために.
主な方法:
- 研究されたSC-SC変換は,イリジウム中心で小さなガス状リガンド (N(2),CO,NH(3),C(2) H(4),H(2),O(2) の交換を含む.
- 使用したピンサーイリジウム (((I) 複合単一結晶.
- 結晶内のプロピレンに対するエチレンの触媒性水素化の観察.
主要な成果:
- 一連のSC-SC変換が達成され,単一結晶は無傷のまま残りました.
- 複数の小型のガス状リガンドが,リガンドの先行挤出なしに,イリジウム中心で成功裏に交換されました.
- プロピレンに対するエチレンの選択的水素化 (25:1) は,COで受動させられたピンサー・イリジウム単一結晶で観察されました.
結論:
- 不孔の分子結晶におけるガス状リガンド交換を含むSC-SC変換の実現可能性を実証した.
- 単一結晶環境内で発生する選択的触媒を展示した.
- 固体反応と分子結晶における触媒の新たな道を開いた.
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