The synthesis and chiral resolution of a dissymmetric tetraurea-calix[4]pyrrole/tetraurea-calix[4]arene molecular capsule with two hemispheres mechanically locked is described. The assembly features a bis-[2]catenated topology and shows reversible molecular co-encapsulation of two different neutral molecules or two oppositely charged ions.
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Chas et al. (2011) studied this question.
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