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Stirring competes with chemical induction in chiral selection of soft matter aggregates
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Chirality, the absence of mirror symmetry, can be equally invoked in relation to physical forces and chemical induction processes, yet a competition between these two types of influence is rarely reported. Here we present a self-assembled soft matter system in which chiral selection is controlled by the combined independent action of a chiral dopant and vortical stirring, which are arbitrarily coupled, either constructively or destructively. In the latter case, perfect compensation, that is, absence of a net chiral effect, is realized. The induced enantiomorphic excess is measured in terms of the statistical imbalance of an ensemble of submillimetre domains, where achiral molecules self-assemble with a well-defined orientational chirality that is unambiguously resolved using optical microscopy. The possibility of combining top-down and bottom-up strategies to induce a chiral predominance in a supramolecular system of achiral components should be recognized as a new twist in the process of chiral recognition, selection and control.
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PETIT GARRIDO, Núria, et al. Stirring competes with chemical induction in chiral selection of soft matter aggregates. Nature Communications. 2012. Vol. 3, num. 1, pags. 1001. ISSN 2041-1723. [consulted: 29 of May of 2026]. Available at: https://hdl.handle.net/2445/156058