从三角形双金字塔到平坦型固体:基于特皮里丁的3D架构的自我组装和自我排序研究
Ming Wang1, Chao Wang, Xin-Qi Hao
1Department of Chemistry and Biochemistry, Texas State University , San Marcos, Texas 78666, United States.
Journal of the American Chemical Society
|July 1, 2014
概括
研究人员使用基于阿达曼坦的三极形连接体组装了离散的3D金属-超分子架构. 左边角精确地引导了自我组装成三角形双金字塔,四面体和立方体结构.
科学领域:
- 超分子化学 超分子化学
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
背景情况:
- 金属超分子化学可以构建复杂的结构.
- 二连接物是金属有机框架的多功能构建块.
- 亚当坦为联结体设计提供了刚性支架.
研究的目的:
- 通过使用新型的三极管连接体组装离散的3D金属超分子架构.
- 研究连接体几何学在指导自我组装中的作用.
- 探索复杂混合组装中的自我分类现象.
主要方法:
- 合成与阿达曼坦功能化的三极形2.2':6',2′′-特皮里丁连接体.
- 金属离子与连接体的自组合形成3D结构.
- 使用NMR光谱 (1H, 13C, DOSY),ESI-MS和TWIMS进行了表征.
主要成果:
- 成功组装了三个不同的3D架构:三角形双金字塔,四面体和立方体.
- 阿达曼坦和特皮里丁单元之间的链接器的角度对最终结构进行了关键控制.
- 双联体混合物 (LA/LC,LB/LC) 的自我排序导致了离散的3D结构的形成.
- 动力学研究揭示了预先组装的立方体和四面体中的缓慢连接体交换,导致统计混合物.
结论:
- 三功能阿达曼坦-tpy配体是可预测的3D金属-超分子组件的有效构建块.
- 精确控制链接器角度决定了自组装路径和最终架构.
- 自排序行为是由连接体内编码的固有几何信息来管理的.
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