Fe18Dy6単分子磁石におけるナノスケールトロイド性安定化に対する無機的アプローチ
Hagen Kaemmerer1, Amer Baniodeh1,2, Yan Peng1,2
1Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.
Journal of the American Chemical Society
|August 14, 2020
まとめ
単一分子の磁石である新しいFe18Dy6サイクルコーディネーションクラスター (CCC) を合成した. 分子レベルで最大のトロイド状の配列は,Dy3の三角形が Fe18のリングをサンドイッチで囲んでおり, 奇特な磁気性を表しています.
科学分野:
- 協調化学
- マグネト化学
- 材料科学
背景:
- サイクルコーディネーションクラスター (CCC) は,有限でサイクルされた鎖構造により,ユニークな磁気特性を有する.
- 単分子磁石 (SMM) は,高度な磁気アプリケーションに興味があります.
- ランタニド (Ln) を含むクラスターは,高核性SMMの開発において重要な構成要素である.
研究 の 目的:
- 新しい Fe18Dy6 サイクルコーディネーションクラスター (CCC) を合成し,特徴づけること.
- この高核群の磁気特性を調べるためだ
- 磁気行動に寄与する構造的特徴,特にダイオンのトロイド状の配置を調査する.
主な方法:
- Ln = DyIII (1),LuIII (2),またはYIII (3) の3つの同構造化合物の合成: [Fe18Ln6 ((μ-OH) 6 ((ampd) 12 ((Hampd) 12 ((PhCO2) 24) ((NO3) 6·38MeCN
- クラスタ全体のアーキテクチャを決定するための構造分析
- Fe と Dy の磁気の中心間の相互作用を理解するための磁気特性測定.
主要な成果:
- Fe18Dy6 CCCは合成され,Lnを含むクラスターの中で最も高い核性を示した.
- 構造は2つのDy3三角で,強く反鉄磁気結合したFe18のリングをサンドイッチしています.
- この配置は,分子レベルで知られている最大のDyイオンアニソトロピーの配置を生成します.
結論:
- 合成されたFe18Dy6 CCCは単分子磁石として有意な可能性を示しています.
- 独特のタオル状の構造は 奇特な磁気行動に 極めて重要です
- この研究は,CCCと分子磁力の範囲を拡大し,新しい磁気材料への道を開く.
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