部分氧化诱导的电导性和对磁性在Ni (II) 中[14]
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
概括
我们合成了一种新的二维金属有机框架 (NiTAA-MOF) 用Ni(II) tetraaza[14]annulene配体. 化学氧化显著增加了其电导率,突出显示了联体氧化在二维MOF中的作用.
科学领域:
- 材料科学
- 化学学
- 固态物理
背景情况:
- 二维金属有机框架 (MOF) 是各种应用的有希望的材料.
- 了解二维MOF的电导率对于其技术进步至关重要.
- 结合的宏环联体在MOF结构中具有独特的电子性质.
研究的目的:
- 合成和描述一种新的2D结合的Ni(II) [14]与烯结合的金属有机框架 (NiTAA-MOF).
- 研究化学氧化对NiTAA-MOF电导性的影响.
- 探索合成材料的磁性特性和潜在应用.
主要方法:
- 使用Ni(II) 四基[14]的NiTAA-MOF合成.
- 通过福里埃变换红外,X射线光辐射和X射线衍射光谱进行结构阐明.
- 密度函数理论 (DFT) 计算用于结构分析.
- 在诱导化学氧化之前和之后的电导度测量.
- 磁化测量以确定磁性特性.
主要成果:
- 2D NiTAA-MOF的成功合成和表征.
- 在氧化时,绝缘NiTAA-MOF (导电率<10^-10 S/cm) 变得导电 (0.01 S/cm).
- 磁化研究揭示了合材料中具有弱反铁磁性合的偏磁性,归因于有机基和Ni (II) 位点.
- 证明了联体氧化在增强二维MOF电导性的关键作用.
结论:
- 连接体氧化是实现二维MOF电导性的关键因素.
- 合成的NiTAA-MOF具有有趣的电子和磁性特性.
- 潜在的应用包括催化,能量储存和动态核极化-核磁共振 (DNP-NMR).
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