过渡金属/兰化物-双键在碳中共同稳定
Zhanxin Jiang1, Ziqi Hu1, Yang-Rong Yao1
1Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
这项研究报告了首次在单个富勒烯内同时稳定过渡金属-和甲双键. 这种独特的集群烯,TiCeN@C84,展示了新的结合和电子特性.
科学领域:
- 无机化学 无机化学 有机化学
- 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:
- 金属-双键在过渡金属复合体中很常见.
- 过渡金属-和-双键在一个化合物中的共存以前没有报告.
- 富勒烯提供了独特的环境,可以稳定新型无机集群.
研究的目的:
- 为了合成和表征一种新的异质核二金属化物集群烯.
- 为了研究过渡金属-和兰化物-双键的同时稳定.
- 为了阐明由此产生的集群烯的电子结构和粘合特性.
主要方法:
- 单晶X射线衍射用于分子结构的确定.
- 密度函数理论 (DFT) 计算用于电子结构分析.
- 合成三元过渡金属-兰坦化异核二金属化封装在C84富勒烯中.
主要成果:
- 集群烯TiCeN@C1(12)-C84已成功合成和表征.
- 短的Ti-N (1.761 Å) 和Ce-N (2.109 Å) 键长证实了Ti=N和Ce=N双键的存在.
- DFT的计算揭示了三个中心的两电子键,负责稳定这些双金属双键.
- 提出了Ti4+Ce3+N3-@C84 4-的电子配置,表明显著的电子转移到富勒烯中.
结论:
- 这项研究表明,在单个分子中首次出现了联合稳定过渡金属-和-双键.
- 在TiCeN@C84中独特的电子配置和粘合突出了负电荷的富勒烯在稳定不寻常的无机结构中的作用.
- 这项工作为设计具有定制电子和化学性质的新型聚合物烯开辟了新的途径.
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