Halogen‐bonding (XB) interactions have been extensively studied in the preparation of crystalline frameworks, yet porous 3D framework materials built on XBs remain elusive. The donor‐acceptor interactions are strengthened by use of anionic XB acceptors; however, the requisite charge‐balancing cations typically disrupt the framework and occupy potential void space. In this work, we prepare a tetratopic XB donor bearing a crown ether moiety for sodium cation sequestration. We show that when this ionpair receptor is crystallised with NaCl it gives a 3D framework that is porous to solvent and vapour, and undergoes single‐crystal‐to‐single‐crystal reactions.

中文翻译：

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通过异质多位离子对模板组装的多孔卤素键合框架


在晶体框架的制备中，卤素键合 （XB） 相互作用已被广泛研究，但基于 XB 构建的多孔 3D 框架材料仍然难以捉摸。使用阴离子 XB 受体加强了供体-受体相互作用;然而，必要的电荷平衡阳离子通常会破坏框架并占用潜在的空隙空间。在这项工作中，我们制备了一个带有冠醚部分的四位 XB 供体，用于钠阳离子螯合。我们表明，当这种离子对受体与 NaCl 结晶时，它会产生一个对溶剂和蒸汽多孔的 3D 框架，并发生单晶到单晶反应。