磁交换和电子导电的固态氧转换在诺基因桥链化合物中
Ie-Rang Jeon1, Lei Sun2, Bogdan Negru1
1Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States.
这项研究表明,链化合物中的特殊连接体可以在减少时切换其光学,磁性和电子性质. 这种可逆氧化还原开关为新型智能材料打开了大门.
科学领域:
- 材料科学
- 无机化学
- 固态化学
背景情况:
- 开发具有可切换性质的材料对于先进技术至关重要.
- 协调固体为探索新功能提供了可调的框架.
- 氧化活性可以赋予含有金属的材料动态行为.
研究的目的:
- 为了研究将氧化还原活性基诺酸结合到一维链化合物中.
- 展示光学,磁性和电子性质的同时固态氧化还原切换.
- 探索这些特性调节的可逆性.
主要方法:
- 一个 ((III) 链化合物的合成与一个特定的基联体 (4,5-bis ((pyridine-2-carboxamido) -1,2-catechol).
- 使用cobaltocene (Cp2Co) 的固态还原和使用ferrocenium ([Cp2Fe](+) 的氧化.
- 使用拉曼光谱,X射线吸收光谱,磁感应度测量和导电度测量进行表征.
主要成果:
- 合成的化合物Mn (N,O) L (DMSO) 具有Mn (II) 中心,由部分减少的连接体组成桥梁.
- 以基为中心的减少到[Mn(N,O) L](-) 导致颜色变化 (从绿色到紫色),磁合增加了40倍,电导率增加了10,000倍.
- 在重新氧化后,观察到的特性变化是可逆的.
结论:
- 基诺酸可以在无孔的协调固体中促进基于基的固态氧化还原反应.
- 这使得光学,磁性和电子性能的可逆切换成为可能.
- 这些发现突出了设计具有可切换特性的先进功能材料的途径.
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