米克圆形铁(II) 双螺旋和一个分子五叶结
Jean-François Ayme1, Jonathon E Beves, David A Leigh
1School of Chemistry, University of Edinburgh, United Kingdom.
Journal of the American Chemical Society
|May 5, 2012
概括
研究人员使用imine凝结合成了新的pentameric循环螺旋体. 这些结构,包括一个独特的分子五叶结,通过各种光谱和晶体学方法进行了鉴定,揭示了自我组装和立体化学的见解.
科学领域:
- 协调化学 协调化学
- 超分子化学 超分子化学
- 有机合成 有机合成
背景情况:
- 金属有机复合物的自我组装对于开发新材料至关重要.
- 循环螺旋体代表了一个具有独特拓的超分子结构的迷人类别.
- 了解控制螺旋体形成的因素是控制分子架构的关键.
研究的目的:
- 合成和描述新的 pentameric 循环螺旋体和相关的分子架构.
- 研究反应参数对这些复合物的自我组装的影响.
- 探索创造合螺旋和复杂的拓结构的潜力.
主要方法:
- 使用基单胺和 bis ((formylpyridine) bipyridyl 构建块的 imine 凝结反应.
- 与铁 (II) 和离子的协调形成循环双链螺旋体.
- 包括NMR光谱学,质谱学,X射线晶体学和圆形二重化学在内的表征技术.
主要成果:
- 成功合成了11个带有不同链的 pentameric 循环螺旋体.
- 组合因子的详细研究:固态度计,度,溶剂和离子效应.
- 单手合螺旋的隔离和一个闭环分子五叶结的制备.
- X射线晶体学证实了螺旋体的结构和五叶状结的拓.
结论:
- 离子在酸盐组合中发挥着重要的模板作用,超出了单纯的离子效应.
- 与相关的tris (((bipyridine)) 连接体相比,以 imine 基的连接体导致不同的螺旋体结构.
- 这项研究证明了对超分子架构的精确控制,使得复杂的拓结构,如分子结,可以形成.
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