Induction of Chirality in Supramolecular Coassemblies Built from Achiral Precursors.

J Phys Chem Lett

State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai JiaoTong University, Dongchuan Road 800, 200240 Shanghai, China.

Published: February 2021

The emergence, transference, amplification, and memory of chiroptical activity in supramolecular assemblies, including circularly polarized absorbance and circularly polarized luminescence, remain significant challenges. Herein, an achiral pyridine-substituted coumarin derivative and chiral additives can coassemble into helical nanostructures with fine chiroptical activity via subtle hydrogen-bonding interactions. The resulting supramolecular assemblies remain optically active even after the removal of chiral additives, demonstrating supramolecular chirality can be remembered in the assemblies. More importantly, the removed chiral elements can be reused to achieve continuous circulation and amplification of chirality. This work presents insight into the emergence, transference, amplification, and memory of chirality in a supramolecular assembly system and could be applied to the manufacturing of chiroptical materials.

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Source
http://dx.doi.org/10.1021/acs.jpclett.0c03400DOI Listing

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