Novel Supramolecular Assemblies Based on Coordination of Samarium Cation to Cucurbit[5]uril

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• 作者：Kai Chen ; Li鈭扡i Liang ; Yun-Qian Zhang ; Qian-Jiang Zhu ; Sai-Feng Xue ; Zhu Tao
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：August 15, 2011
• 年：2011
• 卷：50
• 期：16
• 页码：7754-7760
• 全文大小：1061K
• 年卷期：v.50,no.16(August 15, 2011)
• ISSN：1520-510X

文摘

In the present study, we introduce the coordination of samarium鈥換[5] systems in the absence and presence of the third species, and the corresponding supramolecular assemblies are dependent upon the addition of the third species. In the absence of the third species, a samarium cation (nitrate salt) coordinates to a Q[5] molecule and forms a molecular bowl; in the presence of an organic molecule (hydroquinone), a one-dimensional polymer of 路路路Sm鈥換[5]鈥揝m鈥換[5]鈥揝m路路路 is formed through direct coordination of Sm cation to the portal carbonyl oxygens. In the presence of nickel cations (chloride salt), an infinite 1D supramolecular chain is constructed of samarium/cucurbit[5]uril molecular bowl through ion鈥揹ipole interaction and hydrogen binding; in addition, the stacking of the supramolecular chains forms a novel hexagonal open framework. Remarkably, in the presence of copper cations (chloride salt), Q[5]-based hexagonal netting sheets are constructed of 6-Q[5]-ring structures.