[Fe@Ge(10) ](3-的合成和分离:一个五边形的镜式Zintl离子,封装了一个间歇性铁原子
Binbin Zhou1, Mark S Denning, Deborah L Kays
1Department of Chemistry, Chemistry Research Laboratory, University of Oxford, UK.
Journal of the American Chemical Society
|February 7, 2009
概括
研究人员合成了一种新型的内分体Zintl离子,[Fe@Ge(10)](3-),在一个10个原子的子中包含一个铁原子. 这一发现通过质谱测量在溶液中得到证实.
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:
- 辛特尔相是新型集群化合物的前体.
- 内分体Zintl离子将客原子封装在一个子结构中.
- 这种复合物的合成具有挑战性,需要特定的反应条件.
研究的目的:
- 合成和表征一种含有铁原子的新型内分体Zintl离子.
- 为了研究[Fe@Ge(10) ](3-) 集群的结构性质.
- 为了确认聚离子在溶液中的存在.
主要方法:
- 在乙二胺 (en) 溶液中,K(4) Ge(9) 前体与FeAr(2) 的反应.
- 使用2,2,2-crypt (4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) 作为一个复合剂.
- 由此产生的盐的结晶学表征, [K(2,2,2-crypt) ](3) [Fe@Ge(10) ]*2en.
- 电子喷射质谱 (ESI-MS) 在正离子和负离子模式.
主要成果:
- 成功合成了前所未有的内分体铁离子[Fe@Ge(10) ](3-).
- 结晶学数据显示,五角形的镜形10原子的木,封装了一个铁原子.
- 该化合物被分离为一个[K(2,2,2-crypt) ](+) 盐.
- 据ESI-MS证实,在溶液中存在[Fe@Ge(10) ](3-) 集群离子.
结论:
- 该研究报告了首次合成和表征一个以铁为中心的内分体Zintl离子.
- [Fe@Ge(10) ](3-) 的独特的五角形镜结构代表了Zintl化学中的新结构图案.
- 这些发现表明,乙烯基二胺和密码子在稳定反应性集群离子方面具有实用性.
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