トリデント酸リガンドとZnノードで構築されたイオン伝導金属共性有機フレームワーク
Fangzheng Chen1,2, Kun Zhang2, Yijia Yuan2
1Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University Binhai New City, Fuzhou 350507, China.
Journal of the American Chemical Society
|November 13, 2023
まとめ
ダイナミック・ケミストリーを用いてメタロ・コヴァレント・オーガニック・フレームワーク (metallo-COFs) を合成する新しい方法を開発しました. このアプローチは,フレームワークのコントロールを可能にします.
科学分野:
- 材料科学
- 化学について
- ナノテクノロジー
背景:
- 金属共性有機フレームワーク (metallo-COFs) は,調節可能な特性を持つ高度な材料です.
- メタロCOFを作るための伝統的な方法は,しばしば硬質リガンドと合成後の金属の組み込みを含みます.
- "柔らかい"リガンドを用いたダイナミック合成は,トポロジーと毛穴構造を制御する可能性を秘めている.
研究 の 目的:
- ピリジン-2,6-ダイミン (pdi) リガンドに基づくメタロCOFの合理的な合成を提示する.
- Zn2+イオンの存在または欠如によってフレームワークトポロジー (正方形対カゴメ格子) を制御する能力を実証する.
- メタロCOFの結晶性と組成を改善するための金属模型の合成経路を確立する.
主な方法:
- ピリジン-2,6-ダイミン (pdi) ベースのフレームワークのダイナミック合成.
- トリデント酸リガンドの局所生成とZn2+イオンとの調整.
- 合成された材料の特徴付けは,格子構造と金属-リガンド組成を決定する.
主要な成果:
- Zn2+イオンの存在は,正方形の格子メタロCOFの形成を導いた.
- Zn2+イオンがないため,カゴメ格子を持つトポロジック同位体COFが形成された.
- 金属テンプレート合成により,ブレンステッド酸触媒法と比較して,結晶性が向上し,1:1に近い[Zn2+]/リガンド比率が得られた.
結論:
- Zn2+イオンの存在または欠如は,pdiベースのフレームワークの形態を制御するスイッチとして作用する.
- 高結晶度と精密な金属組み込みを達成するために,金属テンプレート合成アプローチは優れています.
- 合成されたpdiCOF-Zn-3はハネコブ格子で,イオン輸送における応用が有望である.
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