Porphyrinoids racemic

As the simplest, and thus most easily understandable and widely applicable structural type, supramolecular chirogenic systems based on monomeric achiral and racemic porphyrinoids will be discussed first. 

In contrast to achiral/racemic porphyrinoids, the chirogenic properties of chiral porphyrinoids have been scantily investigated despite their prime importance for chiral recognition, asymmetric catalysis, medical purposes, and various biomimetic studies. 

Supramolecular systems on the basis of dimeric and oligomeric porphyrinoids are varied depending upon the chirality of the supramolecular counterparts, type of the covalent linkage, and number of the porphyrin subunits. Firstly, we shall examine examples of the assemblies consisting of achiral and racemic bis-porphyrinoid hosts and chiral guests. 

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