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Published on: February 27, 2019
Inverting the Circularly Polarized Luminescence Handedness of Chiral Supramolecular Polymers Using Temperature
Teodor-Aurelian Cucuiet1, Andreas Vargas Jentzsch1, Flavio Picini1
1SAMS Research Group, Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, Strasbourg, France.
Abstract:
The supramolecular polymerization and chiroptical properties of two enantiopure triarylamine trisamide (TATA) monomers bearing aggregation-induced emissive tetraphenylethene (TPE) units are described. A monosubstituted and a trisubstituted monomer were synthesized and their self-assembly was investigated upon either fast or slow cooling of chlorobenzene solutions. Depending on the cooling rate, two distinct fluorescent self-assemblies of opposite supramolecular chiralities were obtained from each monomer. Both the TATA and the TPE units were found to play important roles in the self-assembly process and chiroptical properties. Remarkably, the self-assembly of the monosubstituted monomer gave rise to a strong circularly polarized luminescence originating from the TATA core (glum values as high as |1.8·10-2| in solution) with opposite cooling-rate-dependent handedness.
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Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...

