Zhao Ying-Nan, Yang Qi, Yao Bo-Han, Cao Ruo-Yu, Zhang Han, Wei Shi-Long, Wei Dong-Hui, Li Kai, Si Yu-Bing, Zang Shuang-Quan
Tianjian Laboratory of Advanced Biomedical Sciences, Henan Key Laboratory of Crystalline Molecular Functional Materials, College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China.
Angew Chem Int Ed Engl. 2025 Mar 24;64(13):e202500481. doi: 10.1002/anie.202500481. Epub 2025 Feb 21.
Copper(I) iodine clusters have drawn intense attention due to their advantageous photophysical properties, such as a high luminescence efficiency, large Stokes shift, and tunable luminescence lifetimes. In this work, a copper(I) iodine cluster (CuI-CHCN) was synthesized, which exhibits unique afterglow emission, ultrahigh quantum yield (90.1 % in solid state) and aggregation-induced emission (AIE) behavior. It was found that thermally activated delayed fluorescence (TADF) and long-lifetime phosphorescence occur simultaneously in CuI-CHCN. The unique photoluminescence properties of CuI-CHCN were attributed to the large spin-orbit coupling (SOC) and long-term rigidity of the crystal. The high quantum efficiency, TADF characteristics, and heavy-atom composition of CuI-CHCN endow it with excellent X-ray excited luminescence (XEL) properties, making it a promising X-ray scintillator. A flexible scintillator screen made of CuI-CHCN was successfully fabricated and used for X-ray imaging with a spatial resolution of 23.6 LP mm.
碘化亚铜簇因其具有诸如高发光效率、大斯托克斯位移和可调节的发光寿命等有利的光物理性质而备受关注。在这项工作中，合成了一种碘化亚铜簇（CuI-CHCN），它表现出独特的余辉发射、超高量子产率（固态下为90.1%）和聚集诱导发光（AIE）行为。研究发现，热激活延迟荧光（TADF）和长寿命磷光在CuI-CHCN中同时发生。CuI-CHCN独特的光致发光性质归因于晶体的大自旋轨道耦合（SOC）和长期刚性。CuI-CHCN的高量子效率、TADF特性和重原子组成赋予其优异的X射线激发发光（XEL）性质，使其成为一种有前景的X射线闪烁体。由CuI-CHCN制成的柔性闪烁体屏幕被成功制备，并用于空间分辨率为23.6 LP mm的X射线成像。
