Organic room-temperature phosphorescent polymers for efficient X-ray scintillation and imaging  

作　　者：Juan Wei Yangyang Jiang Chenyuan Liu Jiayu Duan Shanying Liu Xiangmei Liu Shujuan Liu Yun Ma Qiang Zhao 

机构地区：[1]Nanjing University of Posts and Telecommunications,Institute of Advanced Materials and Institute of Flexible Electronics(Future Technology),State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors,Nanjing,China [2]Nanjing University of Posts and Telecommunications,College of Electronic and Optical Engineering and Microelectronics and College of Flexible Electronics(Future Technology),Jiangsu Province Engineering Research Center for Fabrication and Application of Special Optical Fiber Materials and Devices,Nanjing,China

出　　处：《Advanced Photonics》2022年第3期90-96,共7页先进光子学（英文）

基　　金：the financial support from the National Funds for Distinguished Young Scientists(61825503);the National Natural Science Foundation of China(62075101,61775101,and 61775103);the Natural Science Foundation of Jiangsu Province of China(BK20200095).

摘　　要：Materials that exhibit visible luminescence upon X-ray irradiation show great potential in the medical and industrial fields.Pure organic materials have recently emerged as promising scintillators for X-ray detection and radiography,due to their diversified design,low cost,and facile preparation.However,recent progress in efficient radioluminescence has mainly focused on small molecules,which are inevitably associated with processability and repeatability issues.Here,a concise strategy is proposed to prepare radioluminescent polymers that exhibit multiple emission colors from blue to yellow with high brightness in an amorphous state by the radical copolymerization of negatively charged polyacrylic acid and different positively charged quaternary phosphonium salts.One of the obtained polymers exhibits excellent photostability under a high X-ray irradiation dosage of 27.35 Gy and has a detection limit of 149 nGy s^(−1).This performance is superior to that of conventional anthracene-based scintillators.Furthermore,by simply drop-casting a polymer methanol solution on a quartz plate,a transparent scintillator screen was successfully fabricated for X-ray imaging with a resolution of 8.7 line pairs mm^(−1).The pure organic phosphorescent polymers with a highly efficient radioluminescence were demonstrated for the first time,and the strategy reported herein offers a promising pathway to expand the application range of amorphous organic scintillators.

关 键 词：organic scintillator RADIOLUMINESCENCE room temperature phosphorescence X-ray imaging copolymer. 

分 类 号：TQ317[化学工程—高聚物工业]