Small Molecules Mediated the Chirality Transfer in Self-Assembled Nanocomposites with Strong Circularly Polarized Luminescence

Manipulationof the chirality at all scales has a cross-disciplinaryimportance and may address key challenges at the heart of physicalsciences. One critical question in this field is how the chiralityof one entity can be transferred to the asymmetry of another entity.Here, we find that small molecules play a crucial role in the chiralitytransfer from chiral organic molecules to CdSe/CdS nanorods, wherethe handedness of the nanorod assemblies either agrees or disagreeswith that of the molecular assemblies, leading to the positive orinverse chirality transfer. The assembling mode of nanorods on themolecular assemblies, where the nanorods are either lying or standing,is closely associated with the handedness of the nanorod assemblies,resulting in opposite chirality. Furthermore, we have found that circularlypolarized emission from chiral assemblies of nanorods is dependenton molecular additives. The promoted luminescence dissymmetry factor(g (lum)) of the nanocomposites with a highvalue of & SIM;0.3 could be attained under optimal conditions.