文献类型：期刊文献

英文题名：Hybridized Local and Charge-Transfer Emitter With a Dual-Hindered Indoline Donor for Fast and Efficient Red Plastic Scintillators

作者：Xu, Qiqi[1];He, Hongying[1];Guan, Yiyan[2,3];Yi, Guofeng[1];Yuan, Run[1];Ma, Chenggong[1];Cheng, Jie[1];Shi, Jiayong[1];Wang, Ying[1];Wang, Cheng-Yun[1];Ma, Huili[2,3];Wu, Yongzhen[1,4];Zhu, Wei-Hong[1,4];Zhao, Weijun[1,4]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr,Shangh, Frontiers Sci Ctr Materiobiol & Dynam Chem,Key Lab, Inst Fine Chem,State Key Lab Green Chem Engn & Ind, Shanghai, Peoples R China;[2]Nanjing Tech Univ Nanjing Tech, Key Lab Flexible Elect, Nanjing, Peoples R China;[3]Nanjing Tech Univ Nanjing Tech, Inst Adv Mat, Nanjing, Peoples R China;[4]East China Univ Sci & Technol, Ctr Photosensit Chem Engn, Shanghai, Peoples R China

年份：2026

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20262220780064);WOS:【SCI-EXPANDED(收录号:WOS:001772129200001)】；

基金：The authors are grateful to financial support from the Basic Science Center of National Natural Science Foundation (T2488302), National Natural Science Foundation of China (9235630033, 22105069, 22275085, 62305276, 92356301, 22338006), China National Postdoctoral Program for Innovative Talents under Grant (BX20250111), Shanghai Natural Science Foundation (25ZR1402112), Innovation Program of Shanghai Municipal Education Commission (2023FGS01), Natural Science Foundation of Jiangsu Province (BK20231225), Fundamental and Interdisciplinary Disciplines Breakthrough Plan of the Ministry of Education of China (JYB2025XDXM404) and the China Postdoctoral Science Foundation (2024T170271).

语种：英文

外文关键词：aggregation-induced emission; hybridized local and charge-transfer; organic scintillator; plastic scintillator; triplet exciton

摘要：Flexible organic red/NIR scintillators that convert ionizing radiation into long-wavelength photons are intrinsically compatible with silicon photomultiplier (SiPM), offering strong potential for medical imaging and non-destructive testing. However, their practical development is limited by inadequate radiation absorption, inefficient exciton utilization, and sluggish radioluminescence response. Herein, we report a fast and efficient red organic scintillator based on a hybridized local and charge-transfer (HLCT) emitter featuring an ultra-strong dual-hindered indoline donor. The chair-shaped indoline donor, incorporating a nonconjugated sterically hindered ring, effectively red-shifts the radioluminescence to match SiPM sensitivity while affording a large Stokes shift and aggregation-induced emission characteristics. The introduction of an additional bulky tert-butyl group further suppresses nonradiative decay and, unexpectedly, accelerates reverse intersystem crossing from high-lying excited states, enabling intense radioluminescence with an ultrafast decay lifetime of 3.94 ns-among the fastest reported for red scintillators. The resulting scintillator, cID-Bt, achieves efficient triplet exciton harvesting and delivers a high light yield of 24231 photons MeV- 1 (1.8 times the commercial benchmark BC-430), an ultralow detection limit of 168 nGy s- 1 and a resolution of 16.8 lp mm- 1. Furthermore, cID-Bt-encapsulated plastic scintillators and scintillating fibers demonstrate potential for radiation detection and x-ray imaging, establishing a viable strategy for next-generation organic red/NIR scintillators.