Efficient metal free organic radical scintillators

Ansheng Luo, Jingru Zhang, Dongjie Xiao, Gaozhan Xie (), Xinqi Xu, Qingxian Zhao, Chengxi Sun, Yanzhang Li, Zehua Zhang, Ping Li, Shouhua Luo, Xiaoji Xie, Qiming Peng, Huanhuan Li, Runfeng Chen, Qiushui Chen (), Ye Tao () and Wei Huang ()
Additional contact information
Ansheng Luo: Nanjing University of Posts & Telecommunications
Jingru Zhang: Nanjing University of Posts & Telecommunications
Dongjie Xiao: Nanjing University of Posts & Telecommunications
Gaozhan Xie: Nanjing University of Posts & Telecommunications
Xinqi Xu: Fuzhou University
Qingxian Zhao: Southeast University
Chengxi Sun: Nanjing University of Posts & Telecommunications
Yanzhang Li: Nanjing University of Posts & Telecommunications
Zehua Zhang: Nanjing University of Posts & Telecommunications
Ping Li: Nanjing University of Posts & Telecommunications
Shouhua Luo: Southeast University
Xiaoji Xie: Nanjing Tech University (Nanjing Tech)
Qiming Peng: Nanjing Tech University (Nanjing Tech)
Huanhuan Li: Nanjing University of Posts & Telecommunications
Runfeng Chen: Nanjing University of Posts & Telecommunications
Qiushui Chen: Fuzhou University
Ye Tao: Nanjing University of Posts & Telecommunications
Wei Huang: Nanjing University of Posts & Telecommunications

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract The development of high-performance metal-free organic X-ray scintillators (OXSTs), characterized by a synergistic combination of robust X-ray absorption, efficient exciton utilization, and short luminescence lifetimes, poses a considerable challenge. Here we present an effective strategy for achieving augmented X-ray scintillation through the utilization of halogenated open-shell organic radical scintillators. Our experimental results demonstrate that the synthesized scintillators exhibit strong X-ray absorption derived from halogen atoms, display efficacious X-ray stability, and theoretically achieve 100% exciton utilization efficiency with a short lifetime (∼18 ns) due to spin-allowed doublet transitions. The superior X-ray scintillation performance exhibited by these organic radicals is not only exploitable in X-ray radiography for contrast imaging of various objects but also applicable in a medical high-resolution micro-computer-tomography system for the clear visualization of fibrous veins within a bamboo stick. Our study substantiates the promise of organic radicals as prospective candidates for OXSTs, offering valuable insights and a roadmap for the development of advanced organic radical scintillators geared towards achieving high-quality X-ray radiography.

Date: 2024
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DOI: 10.1038/s41467-024-51482-8

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