部分的酸化誘導電導とパラマグネチスムは,Ni (II) テトラアザ[14]アンヌレンの結合金属有機枠内にある
Yi Jiang1, Inseon Oh2, Se Hun Joo3
1Center for Multidimensional Carbon Materials (CMCM) , Institute for Basic Science (IBS) , Ulsan 44919 , Republic of Korea.
Journal of the American Chemical Society
|October 15, 2019
まとめ
私たちは,Ni ((II) tetraaza[14]annuleneリガンドで新しい二次元金属有機フレームワーク (NiTAA-MOF) を合成しました. 化学的酸化により,その電気伝導性が著しく増加し,2D MOFにおけるリガンド酸化の役割が強調された.
科学分野:
- 材料科学
- 化学について
- 固体物理学
背景:
- 二次元 (2D) メタル・オーガニック・フレームワーク (MOF) は,様々な用途の有望な材料です.
- 2D MOFの電気伝導性を理解することは,その技術の進歩にとって極めて重要です.
- 結合されたマクロサイクリックリガンドは,MOF構造の中でユニークな電子特性を提供します.
研究 の 目的:
- 新しい2D結合Ni(II) テトラアザ[14] (NiTAA-MOF) を合成し,特徴づけること.
- NiTAA-MOFの電気伝導性に対する化学的酸化の影響を調査する.
- 合成材料の磁気特性と潜在的応用を探求する.
主な方法:
- Ni(II) テトラアザ[14]アヌレンのリガンドを用いたNiTAA-MOFの合成.
- フーリエ変換による赤外線,X線光放射,X線微分光譜を用いた構造解明.
- 構造分析のための密度関数理論 (DFT) 計算.
- ヨウ素による化学的酸化前と後の電気伝導性の測定
- 磁気特性を測定する磁気測定.
主要な成果:
- 2D NiTAA-MOFの合成と特徴付けに成功しました.
- 絶縁性NiTAA-MOF (導電性<10^-10 S/cm) はヨウ素酸化により導電性 (0.01 S/cm) になった.
- 磁気化試験は,有機基とNi (II) 部位に起因する,ドーピングされた材料の弱い反鉄磁気結合を持つパラマグネティズムを明らかにした.
- 2D MOFの電気伝導性を高めるためのリガンド酸化の重要な役割を実証した.
結論:
- リガンド酸化は2DMOFの電気伝導性を達成する重要な要因である.
- 合成されたNiTAA-MOFは興味深い電子と磁性特性を示しています.
- 潜在的応用には,触媒,エネルギー貯蔵,ダイナミックな核極化-核磁気共鳴 (DNP-NMR) が含まれる.
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