電子伝導性,フェリマグネティックオーダーリング,および有機混合バレンスの媒介による還元性挿入
Lucy E Darago1, Michael L Aubrey1, Chung Jui Yu1
1Department of Chemistry, University of California , Berkeley, California 94720, United States.
Journal of the American Chemical Society
|November 18, 2015
まとめ
この研究は,リガンド混合バレンスの導電性である0.16 S/cmの高導電性金属有機フレーム (MOF) を示した. この発見は,先進的な電子アプリケーションのための移行金属半キノイドシステムの可能性を強調しています.
科学分野:
- 材料科学
- 固体化学
- 協調化学
背景:
- メタル・オーガニック・フレームワーク (MOF) は多孔性の結晶材料で,様々な用途があります.
- MOFで高い電子伝導性を達成することは依然として大きな課題です.
- リガンド混合バレンシーは,MOFの伝導性を高める潜在的なメカニズムである.
研究 の 目的:
- 高電子伝導性を有する新しいFe (III) 基MOFを合成し,特徴づけること.
- このMOFにおける電子伝導性の起源を明らかにする.
- リガンドの酸化還元状態が導電性および磁性特性に与える影響を調査する.
主な方法:
- 三次元ネットワーク固体の合成 (NBu4) 2Fe (III) 2 (dhbq) 3
- UV対NIRの拡散反射率,周期的な電圧測定,変数温度伝導率および磁気感受性の測定を用いた特徴付け.
- 比較研究のための縮小された枠組材料Na0.9 ((NBu4) 1.8Fe ((III) 2 ((dhbq) 3の合成.
主要な成果:
- MOFは298Kで0.16±0.01S/cmの高い伝導性を示した.
- 電子伝導性の起源として,リガンド混合バレンチが特定されました.
- MOFにおけるロビン・デイのクラスII/III混合バレンスの最初の観察が報告された.
- リガンドの酸化還元状態に対するステキオメトリック制御は,導電性と磁気順序に影響した.
結論:
- Fe ((III) 半キノイドMOFシステムは,例外的な電子伝導性を示しています.
- リガンドの混合バレンシーは,MOFで高い伝導性を達成するための重要な要因である.
- MOFのエスカファードは 調整可能な長距離電子通信の 可能性を示しています
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