Self-assemblies through coordination recognition

Although there have been several approaches to porphyrinic catenanes and rotaxanes [46-48], these have been based on assembly through charged [49] or neutral [50,51] 7r-donor/acceptor concepts, or by using coordination chemistry [47]. Nevertheless, there is a series of non-porphyrinic amide-based catenanes and rotaxanes that have received considerable attention [52,53]. The primary recognition factor in these systems is H-bonding. Gunter [54] has extended these systems to include porphyrinic supramolecu-les that use similar H-bonded amide-based motifs for the self-assembly of multiporphyrin catenanes and rotaxanes. 

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