文献类型：期刊文献

英文题名：Organic Ionic Host-Guest Phosphor with Dual-Confined Nonradiation for Constructing Ultrahigh-Temperature X-ray Scintillator

作者：Wang, Ying[1,2,3,5];Yu, Jiahong[1,2];Zhou, Zixing[4];Zhao, Weijun[1,2,3,5];Wang, Yilong[1,2];Zhao, Jiaqiang[1,2];Ma, Chenggong[1,2];Lin, Zhen-Yi;Wu, Yongzhen[1,2,3,5];Wang, Xiao[4];Ma, Huili[5];Zhu, Wei-Hong[1,2,3,5]

机构：[1]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem,Key Lab, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem,Joint I, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Ctr Photosensit Chem Engn, Shanghai 200237, Peoples R China;[4]Xiamen Univ, Inst Flexible Elect IFE Future Technol, Xiangan Campus, Xiamen 361102, Peoples R China;[5]Nanjing Tech Univ, Inst Adv Mat IAM, Sch Flexible Elect Future Technol, Key Lab Flexible Elect KLOFE, Nanjing 211816, Peoples R China

年份：2025

卷号：147

期号：13

起止页码：11098

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20251218088116);WOS:【SCI-EXPANDED(收录号:WOS:001448906700001)】；

基金：The authors are grateful to the financial support from the Basic Science Center of National Natural Science Foundation (T2488302), the National Natural Science Foundation of China (9235630033, 22105069, 22275085, 62305276, 92356301, 22338006), the Innovation Program of Shanghai Municipal Education Commission (2023FGS01), the Science and Technology Commission of Shanghai Municipality (24DX1400200), the Natural Science Foundation of Jiangsu Province (BK20231225), and the China Postdoctoral Science Foundation (2024T170271).

语种：英文

外文关键词：Band structure - Computerized tomography - Fluorescence imaging - Hadrons - Luminescence of solids - Phosphorescence - Phosphors - Photoluminescence - Photons - Scintillation - Scintillation counters - Thermography (imaging) - X ray detectors - X ray radiography

摘要：Scintillators with X-ray-excitable luminescence have attracted great attention in the fields of medical radiography, nondestructive inspection, and high-energy physics. However, thermal quenching significantly reduces radioluminescence efficiency, particularly for those phosphorescent scintillators with promising radiation-induced triplet exciton utilization, ultimately limiting their applications in high-temperature scenarios. Herein, we develop ultrahigh-temperature scintillators based on organic ionic host-guest phosphorescence systems with unprecedented thermal-stable emissions up to 673 K. The guest phosphor features spin-vibronic coupling-assisted intersystem crossing, effectively transforming phosphorescence to thermally activated delayed fluorescence for overcoming thermal inactivation of triplet excitons. Meanwhile, the rigid ionic host and guest with robust electrostatic interactions minimize both the intrinsic and extrinsic nonradiations of excitons, the so-called dual-confined nonradiation. These two mechanisms work synergistically, contributing to the highly efficient triplet exciton-based luminescence with a room-temperature phosphorescence efficiency of 38.7% and ultrahigh-temperature-resistant dual emissions. Such an innovative ionic host-guest scintillator achieves an impressively low X-ray detection limit of 71.5 nGy s-1 and remarkably bright photoluminescence (efficiency of 80.4% at 483 K), enabling ultrahigh-temperature X-ray imaging.