Inverting the Circularly Polarized Luminescence Handedness of Chiral Supramolecular Polymers Using Temperature

Abstract

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 ( g lum values as high as |1.8·10 −2 | in solution) with opposite cooling‐rate‐dependent handedness.