疏水效应作为多受体开普勒酸囊的宿主-客人化学的驱动力
Nancy Watfa1,2, Dolores Melgar3,4, Mohamed Haouas1
1†Institut Lavoisier de Versailles UMR 8180, Université de Versailles Saint-Quentin, 78035 Versailles, France.
Journal of the American Chemical Society
|April 15, 2015
概括
的 {Mo132} 囊.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 聚氧金属酸盐 (POMs) 是具有独特结构和特性的多功能纳米级材料.
- 开普拉酸盐类型的POM,就像{Mo132}囊一样,提供了分子识别和封装的潜力.
- 了解POM中的客-主互动对于设计功能材料至关重要.
研究的目的:
- 为了研究基酸盐和{Mo132}囊之间的结合相互作用.
- 在POM中量化客封装的稳定性和选择性.
- 为了阐明观察到的客 - 主互动背后的驱动力.
主要方法:
- 使用质子核磁共振 (1H DOSY NMR) 谱法来追踪客体扩散.
- 两站点交换建模用于分析客户绑定动态.
- 进行了分子动力学 (MD) 模拟,以补充实验发现.
- 分析了热力学参数以确定结合亲缘关系.
主要成果:
- 与{Mo132}囊结合的基离子强烈依赖于客体扩散系数.
- 一个两站点交换模型准确地描述了客人与囊 {Mo9O9} 受体的相互作用.
- 随着阴子的无极性质,客的亲和力会增加,这表明具有主导的疏水效应.
- MD模拟显示了不同的不同相互作用模式,区分被困与不稳定的客人.
结论:
- 疏水效应是控制 {Mo132} 囊内客体封装的选择性的主要因素.
- 实验和计算数据提供了对客-主动态的全面了解.
- 这些发现支持使用巨型聚氧甲酸盐用于涉及分子识别和分离的应用.
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