The application of chiral groups in circularly polarized luminescent lanthanide complexes
Yanxin Zha, Zuqiang Bian, Zhiwei Liu
Abstract
Luminescent lanthanide complexes provide a rich variety of radiative f–f and d–f transitions, covering a wide range of emission spectra from ultraviolet to near-infrared. One field where lanthanide complexes are particularly favorable is circularly polarized luminescence (CPL), due to the electric-dipole forbidden nature of f–f transition endowing them with theoretically high dissymmetry factor ( g lum ). Circularly polarized luminescent lanthanide complexes can be designed by incorporating chiral ligands to induce molecular chirality. This review summarizes the ligand design in small-molecule circularly polarized luminescent lanthanide complexes classified by different chiral groups, aiming to shed light on how the structure of chiral ligand influences the photophysical and chiroptical properties of a lanthanide complex, and provide insight into further development of chiral ligands for high-performance CPL emitters.