Multifunctional Chiral Five‐Coordinated Manganese(II) Complexes for White LED and X‐Ray Imaging Applications
Zijian Zhou, Tianxaing Jiang, Yafeng Yang, Yongjing Deng, Mengzhu Wang, Yun Ma, Shujuan Liu, Qiang Zhao
Abstract
Abstract In this study, a pair of chiral manganese(II) complexes is reported based on phosphine oxide, denoted as R/S‐[(L) 2 MnBr]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) 2 MnBr]Br display intense red luminescence at room temperature and demonstrate outstanding circularly polarized luminescence property, featuring luminescence dissymmetry factor values of +1.56 × 10 −2 and −1.94 × 10 −2 , respectively. By integrating S‐[(L) 2 MnBr]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.