链式五核复合体:桥式M (M=Fe,Ru) 的合成,晶体结构和远程电子相互作用
Xiao-Lin Liu1,2, Yi Li1, Hao Wang1
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou, Fujian, 350002, P. R. China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|October 27, 2024
概括
这项研究将新复合物与铁或合成,揭示了在化物桥梁之间强大的电子相互作用. 这些相互作用使得在氧化状态下完全脱的金属桥梁成为可能,在替代复合体中进行了扩展的通信.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
背景情况:
- 化物桥梁金属复合物对于构建先进的功能性材料至关重要.
- 了解多核复合体中的电子通信是设计分子电线和开关的关键.
研究的目的:
- 设计和合成新型链状五核化桥式复合物.
- 研究这些复合体及其氧化形式的电子通信特性.
主要方法:
- 合成两个五核复合物:转-[Ru(bpy) 2 ((μ-CN) 2) [cis-Ru(bpy) 2 ((μ-NC) M(dppe) Cp*] 2[PF6] 4 (M=Fe, 14+; M=Ru, 24+). 通过这些复合物合成的五核复合物.
- 选择氧化状态的单晶X射线衍射分析 (14+, 16+, 17+, 24+).
- 电化学研究探讨氧化产品 (1m+, 2n+) 中的电子通信.
主要成果:
- 综合体14+和24+显示Z型结构,而17+显示U型结构,16+显示两者.
- 横跨中央NC-Ru-CN桥的侧面Ru中心之间非常强的电子相互作用.
- 在三电子氧化状态 (17+和27+) 中形成完全非局部化的Ru-Ru-Ru桥梁.
- 复合体1中终端Fe离子之间没有电子相互作用.
- 综合体2中终端金属离子之间的显著电子相互作用,穿过20 Å三核桥.
结论:
- 合成的复合体展示了通过化桥介导的强大的电子通信.
- 用Ru取代Fe,提高了电子通讯,导致了扩展的移位.
- 这些发现有助于开发具有可调节电子特性的分子材料.
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