チラルのプルーシアン・ブルー アナログ マグネト・キラルの二重性の限界を押し上げる
Matteo Atzori1, Ivan Breslavetz1, Kévin Paillot1
1Laboratoire National des Champs Magnétiques Intenses (LNCMI) , Univ. Grenoble Alpes, INSA Toulouse, Univ. Toulouse Paul Sabatier, EMFL, CNRS, Grenoble F-38042 , France.
Journal of the American Chemical Society
|December 5, 2019
まとめ
マグネトキラル二重化 (MChD) は,可視光を用いたキラルなプルーシアン・ブルー・アナログで観察された. このMChD効果は絶対的な構成に依存し,38K以下の材料の磁化と強く相関する.
科学分野:
- 材料科学
- マグネト化学
- スペクトロスコーピー
背景:
- 磁気特性を有するキラル材料は,高度な光学および電子アプリケーションに興味があります.
- プルーシアン・ブルー・アナログ (PBA) は,調整可能な磁気および光学的特性を持つ多用途の調整化合物である.
- マグネトキラル二重化 (MChD) は,磁気順序と物質のキラル性の両方に敏感な現象である.
研究 の 目的:
- 可視光を用いたキラルなプルーシアン・ブルー・アナログ (PBA) で磁気キラル二重化 (MChD) を調査する.
- MChD信号と材料の磁気順序と構造を相関させる.
- 磁気光学アプリケーションのキラルPBAの可能性を調査する.
主な方法:
- 単一結晶成長のエナティオプアキラルPBA: [MnII ((X-pnH) ((H2O)) ][CrIII ((CN)) ]·H2O
- 構造,絶対的構成,磁気配列温度 (38 K) を決定するX線散離と磁気測定.
- 室温から4Kまでの可視光範囲 (450900 nm) での吸収とMChDスペクトロスコーピー
主要な成果:
- キラルPBAは2D層構造と38K未満のフェリ磁気順序を示している.
- 4Kの電子スペクトルは,CrIIIとMnIIの中心からの貢献と,金属から金属への電荷転送帯を示しています.
- 強烈で絶対的な構成に依存するMChD信号は,磁気配列温度を下回り,材料の磁化に密接に続くことが観察されました.
結論:
- キラルPBAはMChDの有意な効果を示し,最も強い信号は0. 46Tで2. 6%T−1に達した.
- 観測されたMChDは,材料の絶対的構成と磁気状態に強く依存しています.
- この研究は,高度な磁気光学装置のための有望な材料としてのキラルPBAの可能性を強調しています.
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