Enantiomer-racemate regulated material photoluminescence

Chiral and racemic forms of the same molecular components can adopt distinct molecular packing arrangements, leading to differences in crystal structures, intermolecular interactions, and consequently photophysical properties. This review focuses on how chiral/racemic packing and chiral/racemic components regulate photoluminescence, systematically summarizing the associated structural and photophysical differences between chiral and racemic systems. Particular attention is given to how stereoisomerism-induced changes in crystal packing influence energy transfer, exciton behavior, and radiative transition processes, thereby modulating emission wavelengths, emission lifetimes, and photoluminescence quantum yields. The discussion begins with organic small molecules, metal complexes, and extends to organic-inorganic hybrid systems, covalent organic frameworks, eutectics, and perovskite materials. By summarizing recent advances, this review highlights the potential of strategies based on chiral and racemic components regulation in the rational design and performance optimization of photoluminescent materials, offering new perspectives for the development of high-performance photoluminescent systems.