<jats:p>Precise control of assembled structures of quantum dots (QDs) is crucial for realizing the desired photophysical properties, but this remains challenging. Especially, the one‐dimensional (1D) control is rare due to the nearly isotropic nature of QDs. Herein, we propose a novel strategy for controlling the 1D‐arrangement range of cubic perovskite QDs in solution based on the morphological modification of a supramolecular polymer (SP) template. The original template with a short and tangled fibrous structure is prepared in a low‐polarity solvent mixture via self‐assembly of a naphthalenediimide‐functionalized cholesterol derivative with an adhesion group for QDs. Mixing this template with QDs leads to the co‐aggregation into short‐range 1D‐arrays of QDs on the templates. Notably, subsequent heating and cooling of the co‐aggregate solution forms longer‐range 1D‐arrays of QDs with lateral growth, where arranged QDs are sandwiched between reconstructed SP templates. Furthermore, the longer‐range 1D‐array of QDs is achieved via an alternative route involving the pre‐organization of templates into longer and dispersed fibers by heating and cooling of the original template, succeeded by co‐assembly with QDs. Finally, we reveal continuous fluorescence resonance energy transfer between 1D‐arranged QDs by an in‐depth analysis of the photoluminescence decay curves.</jats:p>

<jats:title>Abstract</jats:title><jats:p>Supramolecular polymers (SPs) formed via the stacking of π‐conjugated molecules are attractive nanomaterials because of their potential optoelectronic properties derived from the non‐covalent interaction between the π‐skeletons. Especially, SPs possessing naphthalenediimide (NDI) core units can act as superior electron acceptors due to their deep lowest unoccupied molecular orbital (LUMO). Interaction of such SP with electron donors can realize a charge transfer system, but this has not been established. Herein, we report a photoinduced electron transfer system from cesium lead bromide quantum dot (QD) as an electron donor to SP composed of cholesterol‐functionalized NDI derivatives. The supramolecular polymerization in a non‐polar solvent was analyzed in detail via microscopic and spectroscopic analyses. Upon mixing the SP with QDs, the photoluminescence intensity and lifetime of QDs decreased significantly, indicating efficient photoinduced electron transfer from QD to SP.</jats:p>

<jats:p>Nanostructures formed from chiral Eu(<jats:sc>iii</jats:sc>) complexes exhibit enhanced chiral luminescence and antibacterial activity.</jats:p>