通过金属协调基于连接器调的自组合同型或异型腔体子的完整选择
Kenji Kobayashi1, Yoshifumi Yamada, Masamichi Yamanaka
1Department of Chemistry, Faculty of Science, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan.
Journal of the American Chemical Society
|October 28, 2004
概括
研究人员使用金属协调选择性地形成了 homo-或 hetero-cavitand . 不同的腔体连接体和连接器自组装成特定的子结构,通过协调能力和硬质因子证明受控合成.
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:
- 洞膜体是能够形成复杂结构的分子宿主.
- 金属协调是指导自组装的强大工具.
- 控制特定的超分子架构的形成仍然是一个挑战.
研究的目的:
- 通过金属协调,研究同型和异型体的选择性形成.
- 探索不同体连接体和连接器对自我组装的影响.
- 了解控制子形成选择性的因素.
主要方法:
- 作为深腔联体,利用了四甲基 (4-皮里迪尔) - - 卡维坦 (1),四甲基 (4-皮里迪尔乙烯基) - - 卡维坦 (2),四甲基 (4-氨基) - - 卡维坦 (3).
- 作为金属协调连接器使用Pd (dppp) (OTf) 2 (4) .
- 分析自组装产品使用1H NMR和CSI-MS.
主要成果:
- 人类洞穴 {2(2).4[Pd(dppp) ]}8+.8(TfO-) (5) 和 {2(3).4[Pd(dppp) ]}8+.8(TfO-) (6) 分别是从连接器4.2或3的连接体选择性地形成的.
- 当将连接物2和3组合在一起时,观察到5和6的homo-cavitand混合物1: 1.
- 一个异构体-子 {1.3.4[Pd(dppp) ]}8+.8(TfO-) (7) 完全是从配体1,3和连接器4.4自组装的.
结论:
- 通过金属协调,可以选择性地形成同型或异型洞穴.
- 选择性受体连接体的协调能力和硬质需求的影响.
- 这项工作为复杂的超分子结构的合理设计提供了洞察力.
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