通过有机混合介导的电子导电性,铁磁性排序和还原性插入在铁半形金属有机框架中
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
概括
这项研究表明,高导电性金属有机框架 (MOF) 的导电率为0.16S/cm,由联体混合价值驱动. 这一发现突显了过渡金属半形系统在先进电子应用中的潜力.
科学领域:
- 材料科学
- 固态化学
- 协调化学
背景情况:
- 金属有机框架 (MOF) 是多孔晶体材料,具有多种应用.
- 在MOF中实现高电子导电性仍然是一个重大挑战.
- 连接物混合性是增强MOF导电性的潜在机制.
研究的目的:
- 合成和表征一种具有高电子导电性的基于Fe (III) 的新型MOF.
- 要阐明在这个MOF中电子导电性的起源.
- 研究连接体氧化还原状态对导电性和磁性特性的影响.
主要方法:
- 一个三维网络固体的合成 (NBu4) 2Fe (III) 2 (dhbq) 3.
- 使用紫外相对红外扩散反射率,循环电压测量以及可变温度导电性和磁敏度测量进行表征.
- 为了进行比较研究,合成了减少的框架材料Na0.9 ((NBu4) 1.8Fe ((III) 2 ((dhbq) 3).
主要成果:
- 在298K时,MOF具有0.16±0.01S/cm的高导电性.
- 鉴定出联体混合性是电子导电性的来源.
- 在MOF中首次发现罗宾-戴II/III类混合价值.
- 对连接体氧化还原状态的静态度控制影响了导电性和磁性排序.
结论:
- 这种Fe (III) 半形MOF系统具有卓越的电子导电性.
- 在MOF中实现高导电性的关键因素是基混合性.
- 这种MOF支架显示出可调节的远程电子通信的前景.
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