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Dy (III) ベースの光色複合体における単分子磁石のオン/オフの操作
Yu-Juan Ma1, Ji-Xiang Hu1, Song-De Han1
1College of Chemistry and Chemical Engineering , Qingdao University , Shandong 266071 , P. R. China.
Journal of the American Chemical Society
|January 21, 2020
まとめ
研究者は,室温の可逆光色と光磁性を示す新しいランタニド基鎖複合体を開発した. 光に触発された単一分子磁石の 切り替え可能な振る舞いを示し 光学スイッチや磁気メモリへの道を開きました
科学分野:
- 材料科学
- マグネティズム
- 写真化学
背景:
- 光学スイッチや磁気メモリなどの先進技術では,室温で切り替え可能な磁気特性を有する材料の開発が不可欠です.
- 単一分子磁石 (SMM) の動作を達成するために,光色学と光磁性を利用することは,材料科学における重要な課題です.
研究 の 目的:
- RTで光色と光磁性特性を発揮できる新しいランタニド基鎖複合体を合成し,特徴づけること.
- これらの材料における光誘発SMMの振る舞いのメカニズムを調査し,それらの潜在的な応用を探求する.
主な方法:
- ランタニド (Dy,Gd,Y) 鎖複合体とヒドロキシエチリデンジフォスフォナート (HEDP) と2,4,6-トライド4-ピリジル) -1,3,5-トリアジン (TPT) の溶熱合成
- フォトクロミックとフォトマグネティック効果を誘導する紫外線照射実験
- SMMの動作と磁気放緩のダイナミクスを評価するための磁気特性測定.
主要な成果:
- 合成された複合体 (QDU-1) は,紫外線照射時にRTで可逆的な光色および光磁性行動を示した.
- これらの現象の原因は,光生成ラジカルを含む光誘発電子移転 (PET) メカニズムであることが判明した.
- Dy (III) 類は,強烈な鉄磁気結合とDCフィールドの適用なしの緩やかな磁気放緩を示し,RT照明後にSMMの振る舞いを示した.
- この研究は,ランタニドベースの材料における可逆的なRT光色と光磁性の最初の観測を報告しています.
結論:
- 開発されたランタニド複合体は,光制御された磁気特性の新しいプラットフォームを提供します.
- 観測された激素誘発型SMMのオン/オフ行動は,光誘発型SMMを設計し,光学スイッチや磁気メモリ装置で潜在的に使用するための新しい戦略を提供します.
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