Molecular engineering is reliable for the development of circularly polarized luminescence (CPL) materials for various applications. However, the creation of dual-state CPL platforms, which possessing chirality while achieving a delicate balance between molecular rigidity and flexibility, remains a formidable challenge. Here, a novel bisarylboron anchored pyrrolylsalicylhydrazone (BOPSH) platform was synthesized via a facile “one-pot” condensation. These key aryl-boron substituents not only provide structure rigidity rendering the bright emission of the fluorophore, and suppress the emission quenched stacking in solid states due to their twisting and bulk steric effect, but also generate boron-stereogenic center and possible strong CPL through promoting intramolecular charge-transfer transitions. As a result, these BOPSHs show intense absorption, strong dual-state emission in both solution and solid states (ΦPL value approaching to unity) emitting across the visible region, and excellent chem/photo-and thermal stability. Meanwhile, their enantiomers display dual-state CPL performance with luminescence dissymmetry factors (glum) up to 9.40 × 10-3, and CP electroluminescence (EL) with dissymmetry factor (gEL) of 3.07 × 10−3 and excellent maximum external quantum efficiencies (ηext,max) of 5.0% that approaching the theoretical limit for fluorescent molecules. We expect our study to break new ground in construction of chiral dual-state materials with diverse structures.
