Room Temperature Phosphorescence in Chiral 0D Zn(II) Metal Halide Crystals for Multiple Anti‐Counterfeiting

作者：Yanan Wang, Chao Wang, Mengjiao Sun, Peng Jun Zhao, Xiaoxue Fang, Jingran Zhang, Yurong Guo, G. Zhao · 发表于：Advanced Optical Materials · 年份：2023 · DOI：10.1002/adom.202301843 · 被引用次数：25 · 研究领域：Luminescence and Fluorescent Materials、Perovskite Materials and Applications、Crystallography and molecular interactions

Abstract The development of metal halides that enable multiple information storage and cryptographic security is highly desirable but remains a challenge. Here, a pair of 0D Zn(II) metal halide enantiomers ZnCl2·R/S‐2‐MP with excitation wavelength‐dependent emission and room temperature phosphorescence properties are reported. Organic ligands via N─H···Cl hydrogen bonding induce structural chirality. In order to stabilize the triplet state exciton and achieve excellent photophysical properties, the organic ligands combine with halogens to promote emission. The differences between the photophysical properties of ZnCl2·R‐2‐MP and ZnCl2·S‐2‐MP are analyzed in depth. Furthermore, combined with femtosecond transient absorption (fs‐TA) results, the long phosphorescence lifetimes may originate from the triplet state emission due to the synergistic effect between the organic components and the inorganic metal halides. The design strategy of advanced multiple anticounterfeiting technology is further extended.