Zhang Yimei, Du Tingli, Duan Han, Chen Binqi, Zhang Jiahui, Xiao Qin, Chen Geng, Guo Dongxin, Liao Hong, Zhou Si, Zheng Kezhi
Key Laboratory of Atomic and Subatomic Structure and Quantum Control (Ministry of Education), Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, School of Physics, South China Normal University, Guangzhou, 510006, China.
Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong-Hong Kong Joint Laboratory of Quantum Matter, South China Normal University, Guangzhou, 510006, China.
Angew Chem Int Ed Engl. 2025 Mar 24;64(13):e202423155. doi: 10.1002/anie.202423155. Epub 2025 Jan 14.
Scintillators that convert ionizing radiation into low-energy photons are essential for medical diagnostics and industrial inspections. Despite advances in X-ray scintillators, challenges remain in achieving high efficiency, environmental compatibility, stability, and flexibility. Here, we present experimental investigations of a new type of europium(III)-based hybrid ternary complex scintillators for improved X-ray detection and imaging. Benefiting from the synergistic interaction between dual organic ligands and lanthanide ions, the Eu(TTA)Phen complex demonstrates exceptional radioluminescence and light yield under X-ray excitation, with a detection limit of 19.97 nGy s, well below typical radiation doses used in medical diagnostics. Moreover, lanthanide complex Eu(TTA)Phen exhibited excellent thermal and photostability, showing minimal degradation even after extended X-ray exposure. By integrating with flexible polymer matrices, a high-transmission Eu(TTA)Phen-PMMA composite film was fabricated for X-ray radiography, demonstrating high spatial resolution (<10 um) and superior image quality across various target samples. These findings hold substantial promise for next-generation X-ray imaging applications, offering high sensitivity, stability, flexibility, and versatility, making them ideally suited for advanced radiographic systems.
将电离辐射转化为低能光子的闪烁体对于医学诊断和工业检测至关重要。尽管X射线闪烁体取得了进展，但在实现高效率、环境兼容性、稳定性和灵活性方面仍存在挑战。在此，我们展示了一种新型基于铕（III）的混合三元复合闪烁体用于改进X射线检测和成像的实验研究。得益于双有机配体与镧系离子之间的协同相互作用，Eu（TTA）Phen配合物在X射线激发下表现出卓越的辐射发光和光产额，检测限为19.97 nGy s，远低于医学诊断中使用的典型辐射剂量。此外，镧系配合物Eu（TTA）Phen表现出优异的热稳定性和光稳定性，即使在长时间X射线照射后降解也极小。通过与柔性聚合物基质集成，制备了用于X射线摄影的高透射率Eu（TTA）Phen-PMMA复合膜，在各种目标样品上展示出高空间分辨率（<10 um）和卓越的图像质量。这些发现为下一代X射线成像应用带来了巨大希望，具有高灵敏度、稳定性、灵活性和多功能性，使其非常适合先进的射线照相系统。
