2026/06/01 by Si‐Dan Guo, Yi‐Fan Ma, Haiting Di +6 · 1 voice
Chemistry · Materials Science · #Synthesis and Properties of Aromatic Compounds #Luminescence and Fluorescent Materials #Supramolecular Chemistry and Complexes
paper · doi:10.1002/agt2.70382
openalex publication_date 2026/06/01 · openalex created_date 2026/06/16 · openalex updated_date 2026/06/19
ABSTRACT Chiral macrocyclic compounds provide a well‐defined and modular platform for developing high‐performance circularly polarized luminescent (CPL) materials. Here we report a π‐extended chiral molecular triangular prism based on a pyromellitic diimide (PMDI) scaffold, constructed via Sonogashira cross‐coupling from enantiopure macrocyclic precursors. Introduction of six aryl‐ethynyl substituents expands the conjugated framework, leading to pronounced bathochromic shifts and efficient orange fluorescence. Circular dichroism measurements reveal partial transfer of point chirality from cyclohexanediamine moieties to the rigid prismatic framework. More importantly, solvent‐dependent self‐assembly induces inversion and substantial amplification of chiroptical responses, affording | g lum | values up to 1.15 × 10 −2 without relying on charge‐transfer co‐assembly. Single‐crystal X‐ray analyses uncover solvent‐regulated conformations and packing modes, linking molecular structure to macroscopic chiral organization.