コンテナ分子における設計要素としてのホメオモルフイソメリゼーション; MCl2種の結合,移動,選択的輸送 (M = Pt, Pd, Ni)
Sugam Kharel1, Hemant Joshi1, Stephen Bierschenk1
1Department of Chemistry, Texas A&M University , P.O. Box 30012, College Station, Texas 77842-3012, United States.
Journal of the American Chemical Society
|January 12, 2017
まとめ
新しいディフォスフィン・リガンドは,金属二塩化物 (MCl2) の水分と有機相間の効率的な輸送を容易にする. このプロセスは,選択的な金属回収を可能にするシアン酸カリウムを使用することで大幅に強化されます.
科学分野:
- 有機金属化学
- 協調化学
- 材料科学
背景:
- ディブリッジヘッド・ディフォスフィンは,ユニークなホメオモルフイソメリゼーションを示す.
- アウト,アウトの単一のペアは,ルイス酸性金属二塩化物 (MCl2) と連携することができます.
- MCl2 (M = Pt, Pd, Ni) でケージ状のアドクトが形成される.
研究 の 目的:
- 金属二塩化物の輸送能力を調査する.
- 金属輸送効率に相移転条件と添加物の影響を調査する.
- 異なる金属二塩化物の輸送速度を比較する.
主な方法:
- ブリッジヘッドディフォスフィン ((CH2) 14) 3Pのホメオモルフイソメリゼーション.
- MCl2によるケージ状アダクトの形成
- 金属輸送のための液体-液体抽出実験.
- ディクロロメタンと水溶液を用いた相移転試験
- 金属輸送運動と均衡比の分析
主要な成果:
- ディフォスフィン・リガンドはMCl2を効果的に除去し,安定したアダクトを形成する.
- 金属二塩化物輸送は,KCNのような添加物によって影響される均衡状態で達成されます.
- シアン酸カリウムは輸送を大幅に加速し,バランス比率を改善します.
- パラジウム二塩化物 (PdCl2) の輸送は,混合システムでのプラチナ二塩化物 (PtCl2) よりも速い.
- 長い鎖の類似体であるP ((CH2) 18) 3Pは,同様の有効性を示しています.
結論:
- ディブリッジヘッド・ディフォスフィンは,不混合相間のMCl2輸送のための効果的なリガンドである.
- KCNを添加物として使用することで輸送効率と選択性が劇的に向上します.
- このシステムは,選択的な金属回収と分離のための有望な方法を提供します.
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