Helical structures have inspired scientists due to the relevant functionalities displayed for these chiral entities in living organisms. Macromolecules and small molecules have been thoroughly utilized to achieve this fascinating, chiral topology. Of special interest is the process of transfer and amplification of asymmetry reached in supramolecular polymers from the molecular to the supramolecular level that finally yields helical aggregates.1 In this communication, we will show two different examples on chirality in supramolecular polymers. In the first one, the kinetic, chain-capper effect provoked by the metastable monomeric species (M*) formed from the trisbiphenylamine tricarboxamides (S)-1 and (R)-1 in the corresponding majority rules (MR) experiments will be presented.2 In the second example, the formation of homochiral helical aggregates from self-assembled N-annulated perylene tetracarboxamides 3-5, capable to emit circularly polarized light (CPL) with remarkable |glum| values, will be illustrated as an example of the achievement of functional, supramolecular polymers.3 Figure 1. (a) Chemical structure of the trisbiphenylamine tricarboxamides (S)-1 and (R)-1; (b) schematic illustration of the chain-capper effect exerted by the M* species in the MR experiments; (c) chemical structure of the N-annulated perylene tetracarboxamides 3-5; (d) schematic illustration of the formation of supramolecular CPL-emitters from chiral 3 and 4.

Transfer and amplification of asymmetry in supramolecular polymers: From kinetic effects to CPL-emitter materials

ACS Fall 2021

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