Multifunctional Chiral Five-Coordinated Manganese(II) Complexes for White LED and X-Ray Imaging Applications

In this study, a pair of chiral manganese(II) complexes is reported based on phosphine oxide, denoted as R/S-[(L)2MnBr]Br (L = 5,5 '-bis(diphenylphosphine oxide)-4,4 '-bi-1,3-benzodioxole). These complexes exhibit distinctive five-coordinated crystal structures and high stability. In addition, R/S-[(L)2MnBr]Br display intense red luminescence at room temperature and demonstrate outstanding circularly polarized luminescence property, featuring luminescence dissymmetry factor values of +1.56 x 10-2 and -1.94 x 10-2, respectively. By integrating S-[(L)2MnBr]Br with commercial phosphors, a white light-emitting diode is successfully fabricated with a correlated color temperature of 4512 K, achieving a remarkable color rendering index of 96.9. Furthermore, a exceptional scintillation performance is observed in the target compounds and ultimately showcase X-ray imaging with a spatial resolution of up to 11.9 lp mm-1. This endeavor imparts invaluable insights for the advancement of prospective multifunctional chiral manganese(II)-based luminescent materials. R/S-[(L)2MnBr]Br display outstanding circularly polarized luminescence, with luminescence dissymmetry factor values of +1.56 x 10-2 and -1.94 x 10-2, respectively. And a white light-emitting diode with an excellent color rendering index of 96.9 is also successfully fabricated. Furthermore, X-ray imaging with a spatial resolution of 11.9 lp/mm by using R-[(L)2MnBr]Br is demonstrated. image