The ability of a cationic coordination cage to encapsulate molecular guests is enhanced by non-covalent capping of the cage portals with tripodal anions. The capped cage provides new cation binding sites at the portals, which enable accommodation of cationic substrates within the cationic cage. In addition, non-covalent capping allows neutral guests in the cage to be exchanged for cationic ones on demand.

中文翻译：

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通过用三足阴离子封闭门户将水溶性阳离子底物限制在阳离子分子笼中

阳离子配位笼封装分子客体的能力通过用三足阴离子非共价加盖笼门来增强。加帽笼在入口处提供了新的阳离子结合位点，从而能够在阳离子笼内容纳阳离子底物。此外，非共价封顶允许笼子中的中性客人按需更换为阳离子客人。