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基于腔体的协调的自我组装和离子封装特性
F Fochi1, P Jacopozzi, E Wegelius
1Dipartimento di Chimica Organica e Industriale, Università di Parma, Parco Area delle Scienze 17/A, I-43100 Parma, Italy.
Journal of the American Chemical Society
|August 2, 2001
概括
研究人员使用自组装开发了新的协调,识别了金属中心和带预组织等关键因素. 这些由驱动的子选择性地封装离子,空腔大小会影响客体结合和溶剂相互作用.
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:
- 基于腔体的分子为宿主-客体化学提供了独特的结构框架.
- 自组装是构建复杂分子架构的强大策略.
研究的目的:
- 综合和描述基于洞穴的新型协调.
- 确定控制子自组装 (CSA) 的关键因素.
- 调查这些新子的离子封装选择性和驱动力.
主要方法:
- 通过自组装程序进行合成.
- 热量测量测量和动态NMR光谱 (1H和19F) 用于研究热力学.
- 进行X射线晶体学以确定子结构.
- 客人竞赛实验和电子喷射电离质谱学 (ES-MS) 结合分子建模进行选择性分析.
主要成果:
- 成功合成了两种新的协调 (7a-j和8a-d) 类.
- 对于CSA的关键因素包括P-M-P角度 (~90°),Pd/Pt金属中心,弱协调的 counterions 和联结体预组织.
- 子自组装是一个由驱动的过程.
- 封装选择性遵循BF(4)(-) >CF(3)SO(3)(-) >>PF(6)(-),受溶解度,腔体大小和形状的影响.
- 子7d的晶体结构显示了封装的三叶酸.
结论:
- 这项研究阐明了控制基于洞穴和协调的自组装的基本原则.
- 开发的子具有可调节的离子结合特性,显示出分子识别和分离应用的潜力.
- 腔体尺寸和客体溶解在确定封装选择性方面起着至关重要的作用.
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