場所選択的熱および光誘発のスピンクロスオーバーを示す超分子鉄金属キューバン
Izar Capel Berdiell1, Tim Hochdörffer2, Cédric Desplanches3
1School of Chemistry , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , U.K.
Journal of the American Chemical Society
|November 6, 2019
まとめ
この研究は,封じ込められた鉄 (III) イオンによってテンプレートされた新しい鉄 (II) キューバンの複合体の合成を詳細に説明する. これらの複合体は,分子磁気性にとって重要な温度依存のスピンクロスオーバー行動を示す.
科学分野:
- 協調化学
- 超分子化学
- 材料科学
背景:
- 鉄の複合体は 分子スイッチや磁気材料の開発に不可欠です
- 鉄の複合体におけるスピン・クロスオーバー現象は,調節可能な磁気特性を可能にします.
- テンプレート合成は複雑なアーキテクチャを正確に制御できます
研究 の 目的:
- 新しい鉄を合成し,特徴づけること
- これらの鉄 (II) 複合体のスピン・クロスオーバーの行動を調査する.
- クラスターアセンブリにおけるテンプレートと水素結合の役割を理解する.
主な方法:
- 特定のピリミディノンのリガンドを用いた鉄 (II) 複合体の溶熱合成.
- 立方体構造と結合を決定するX線結晶学
- 磁気感受性測定,モッズバウアー光譜,およびスピンクロスオーバーを研究するための分散反射光譜.
主要な成果:
- 2つの鉄IIIOH2) 6の合成が成功しました. FeII8<μ-L>12[BF4]7 (1,2).
- キューバンのアセンブリは,水素結合によって封じ込められた[Fe ((OH2) 6]3+イオンによってテンプレートされる.
- 鉄 (II) センターは冷却時に高低スピンクロスオーバーを示し,複数のスペクトル検査技術によって確認されています.
結論:
- この研究は,鉄 (II) キューバのクラスターのテンプレート合成の成功を示しています.
- 水素結合は キューバの建築の形成に 重要な役割を果たしています
- 観察されたスピン・クロスオーバーの行動は,これらの複合体の分子磁気性および切り替え可能な材料の可能性を強調しています.
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