Na6ZnSn2,Na4.24K1.76(1)ZnSn2和Na20Zn8Sn11:三个含有线性{Sn-Zn-Sn}6单位的金属间结构
Sung-Jin Kim1, Florian Kraus, Thomas F Fässler
1Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, D-85747 Garching, Germany.
Journal of the American Chemical Society
|January 14, 2009
概括
新的金属化合物Na6ZnSn2,Na4.24K1.76ZnSn2和Na20Zn8Sn11具有线性{Sn-Zn-Sn}6 - 离子和新的{Zn7Sn5}双面层. 量子化学分析证实了共价 Sn-Zn 结合.
科学领域:
- 固态化学 固态化学
- 无机化学 无机化学
- 材料科学 材料科学 材料科学
背景情况:
- 对新型金属间化合物的探索对于理解化学结合和发现新材料至关重要.
- 与过渡后金属结合的金属化合物具有多样化的结构图案和电子性质.
研究的目的:
- 合成和表征,,和锡的新型金属间化合物.
- 阐明这些新型化合物的晶体结构和结合特性.
- 研究合成材料的电子结构和磁性特性.
主要方法:
- 基本元素前体的直接融合.
- 单晶X射线衍射用于结构确定.
- 量子化学计算 (NBO,AIM,ELF,DFT/LMTO) 用于结合分析.
- 测量磁感应度的测量.
主要成果:
- 合成了三种新的金属间化合物,Na6ZnSn2 (1),Na4.24K1.76ZnSn2 (2) 和Na20Zn8Sn11 (3).这些新化合物包括:
- 所有化合物都表现出新的结构类型,包括带有短Zn-Sn键的线性{Sn-Zn-Sn}6 - 离子和含有{Zn7Sn5}二面体层的化合物3.
- 量子化学分析证实了锡和原子之间的共价键,Na-Sn接触也在化合物1中发挥作用,该化合物表现出弱二磁性.
结论:
- 合成的化合物代表了金属-化物化学中的新型结构类型.
- 线性{Sn-Zn-Sn}6-离子和{Zn7Sn5}二面体的存在突出了独特的结合安排.
- 该研究提供了对这些复杂的金属间相中的共价和离子键的相互作用的见解.
相关概念视频
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