纬-Cyclodextrin Cuprate Sandwich-Type Complexes

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• 作者：Abdulaziz A. Bagabas ; Marco Frasconi ; Julien Iehl ; Brad Hauser ; Omar K. Farha ; Joseph T. Hupp ; Karel J. Hartlieb ; Youssry Y. Botros ; J. Fraser Stoddart
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：March 18, 2013
• 年：2013
• 卷：52
• 期：6
• 页码：2854-2861
• 全文大小：393K
• 年卷期：v.52,no.6(March 18, 2013)
• ISSN：1520-510X

文摘

Three structures, based on 纬-cyclodextrin (纬-CD) and metal ions (Cu²⁺, Li⁺, Na⁺, and Rb⁺), have been prepared in aqueous and alkaline media and characterized structurally by single-crystal X-ray diffraction. Their dimeric assemblies adopt cylindrical channels along the c axes in the crystals. Coordinative and hydrogen bonding between the cylinders and the solvent molecules lead to the formation of two-dimensional sheets, with the identity of the alkali-metal ion strongly influencing the precise nature of the solid-state structures. In the case of the Rb⁺ complex, coordinative bonding involving the Rb⁺ ions leads to the formation of an extended two-dimensional structure. Nonbound solvent molecules can be removed, and gas isotherm analyses confirm the permanent porosity of these new complexes. Carbon dioxide (CO₂) adsorption studies show that the extended structure, obtained upon crystallization of the Rb⁺-based sandwich-type dimers, has the highest CO₂ sequestration ability of the three 纬-CD complexes reported.