Coordination supramolecular assemblies of monohydroxycucurbit[7]uril ((HO)Q[7]) with alkaline earth metal ions (AE²⁺) have been formed in aqueous HCl solution in the presence of tetrachloride cadmium anions ([CdCl₄]²⁻) as a structure directing agent. The driving force for the assembly could be attributed to the interaction of the positive electro-potential outer-surface of (HO)Q[7] molecules with [CdCl₄]²⁻ anions and ionic dipole interaction of the hydroxyl of (HO)Q[7] molecules with [CdCl₄]²⁻ anions. Moreover, the porous structure of the (HO)Q[7]/AE²⁺-based coordination supramolecular assemblies could result in potential applications in the selective sorption of polar volatile organic molecules, which may be useful in molecular sieves, sensors, absorption and separation.

中文翻译：

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单羟基葫芦[7]尿素的配位超分子组装及其在气体吸附中的潜在应用†

在四氯化镉镉阴离子（[CdCl ₄ ] ²⁻）存在下，在HCl水溶液中形成了单羟基葫芦[7]尿素（（HO）Q [7]）与碱土金属离子（AE ²⁺）的配位超分子组装体。作为结构导向剂。组件的驱动力可归因于（HO）Q [7]分子的正电势外表面与[CdCl ₄ ] ^2-阴离子的相互作用以及（HO）Q的羟基的离子偶极相互作用[7]具有[CdCl ₄ ] ^2-阴离子的分子。此外，（HO）Q [7] / AE ²⁺的多孔结构的配位超分子组装可能会导致极性挥发性有机分子选择性吸附的潜在应用，这可能在分子筛，传感器，吸收和分离中有用。