磁気交換と電子伝導の固体レドックススイッチング ベンゾキノイドブリッジ Mn ((II) チェーン化合物
Ie-Rang Jeon1, Lei Sun2, Bogdan Negru1
1Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States.
Journal of the American Chemical Society
|April 27, 2016
まとめ
この研究では 鎖化合物の特殊なリガンドが 縮小されると 光学,磁気,電子の性質を切り替えることが示されています このリバーシブル・レドックス・スイッチングは 新しいスマート・マテリアルの扉を開きます
科学分野:
- 材料科学
- 無機化学
- 固体化学
背景:
- 交換可能な性質を持つ材料の開発は,先進技術にとって極めて重要です.
- 新しい機能を探求するための 調整可能なフレームワークを提供します
- レドックス活性リガンドは,金属を含む材料にダイナミックな振る舞いを与えることができます.
研究 の 目的:
- レドックス活性ベンゾキノイドの結合を 一次元連鎖化合物で調べる
- 光学,磁気,電子の固体状態の同時リドックススイッチングを実証する.
- これらのプロパティの可逆性を探求する.
主な方法:
- 特定のベンゾキノイドリガンド (4,5-bis(ピリジン-2-カルボキシアミド) -1,2-カテコール) を含むマンガン (III) 鎖化合物の合成.
- コバルトセーン (Cp2Co) を用いた固体還元とフェロセニウム ([Cp2Fe](+)) を用いた酸化.
- ラマン光譜法,X線吸収光譜法,磁気感受性測定,導電性測定を用いた特徴付け.
主要な成果:
- 合成された化合物Mn (N,O) L (DMSO) は,部分的に還元されたリガンドによって橋渡しされたMn (II) センターを特徴とする.
- リガンドを中心に[Mn(N,O) L) ](-) に還元すると,色が変化 (緑色から紫色),磁気結合が40倍,導電性が1万倍に増加した.
- 観察された性質の変化は,再酸化時に可逆的であった.
結論:
- ベンゾキノイド・リガンドは,無孔の調整固体におけるリガンドベースの固体酸化還元反応を促進する.
- これは,光学,磁気,電子の性質の可逆的な切り替えを可能にします.
- この発見は,切り替え可能な特性を持つ高度な機能材料を設計するための経路を強調しています.
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