The host-guest recognition between two macrocycles to form hierarchical non-intertwined ring-in-ring assemblies remains an interesting and challenging target in noncovalent synthesis. Herein, we report the design and characterization of a box-in-box assembly on the basis of host-guest radical-pairing interactions between two rigid diradical dicationic cyclophanes. One striking feature of the box-in-box complex is its ability to host various 1,4-disubstituted benzene derivatives inside as a third component in the cavity of the smaller of the two diradical dicationic cyclophanes to produce hierarchical Russian doll like assemblies. These results highlight the utility of matching the dimensions of two different cyclophanes as an efficient approach for developing new hybrid supramolecular assemblies with radical-paired ring-in-ring complexes and smaller neutral guest molecules.

中文翻译：

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分子的俄罗斯娃娃。

在两个大环之间形成分层的非交织的环中环的主客体识别仍然是非共价合成中一个有趣且具有挑战性的目标。在这里，我们报告了基于两个刚性双基双顺和环芳基之间的客体自由基配对相互作用的盒中盒组装的设计和表征。盒中盒复合物的一个显着特征是它能够将各种1,4-二取代的苯衍生物作为第三双组分双偶性环糊精中较小者的腔体中的第三组分容纳在内部，以产生分层的俄​​罗斯玩偶样组件。