Journal
MOLECULES
Volume 25, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/molecules25020402
Keywords
homochirality; self-assembly; triarylamine; circularly polarized light; helical systems; spontaneous symmetry breaking
Funding
- National Research Foundation (NRF) of Korea [NRF-2015R1A2A1A10055222, NRF-2019R1H1A2039753, NRF-2018R1A5A1025208]
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Here, we report the formation of homochiral supramolecular thin film from achiral molecules, by using circularly polarized light (CPL) only as a chiral source, on the condition that irradiation of CPL does not induce a photochemical change of the achiral molecules. Thin films of self-assembled structures consisting of chiral supramolecular fibrils was obtained from the triarylamine derivatives through evaporation of the self-assembled triarylamine solution. The homochiral supramolecular helices with the desired handedness was achieved by irradiation of circularly polarized visible light during the self-assembly process, and the chiral stability of supramolecular self-assembled product was achieved by photopolymerization of the diacetylene moieties at side chains of the building blocks, with irradiation of circularly polarized ultraviolet light. This work provides a novel methodology for the generation of homochiral supramolecular thin film from the corresponding achiral molecules.
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