Influence of Isomerism on Radioluminescence of Purely Organic Phosphorescence Scintillators. (20th October 2021)

• Record Type: Journal Article
• Authors: Dong, Chaomin; Wang, Xiao; Gong, Wenqi; Ma, Wenbo; Zhang, Meng; Li, Jingjie; Zhang, Yuan; Zhou, Zixing; Yang, Zhijian; Qu, Shuli; Wang, Qian; Zhao, Zhu; Yang, Guohui; Lv, Anqi; Ma, Huili; Chen, Qiushui; Shi, Huifang; Yang, Yang (Michael); An, Zhongfu
• Is Part Of: Angewandte Chemie. Volume 133:Number 52(2021)
• Page Start: 27401
• Page End: 27406
• Publication Date: 2021-10-20
• Subjects: conductivity -- molecular packing -- organic scintillator -- radioluminescence -- room temperature phosphorescence; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202109802
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: There are few reports about purely organic phosphorescence scintillators, and the relationship between molecular structures and radioluminescence in organic scintillators is still unclear. Here, we presented isomerism strategy to study the effect of molecular structures on radioluminescence. The isomers can achieve phosphorescence efficiency of up to 22.8 % by ultraviolet irradiation. Under X‐ray irradiation, both m ‐BA and p ‐BA show excellent radioluminescence, while o ‐BA has almost no radioluminescence. Through experimental and theoretical investigation, we found that radioluminescence was not only affected by non‐radiation in emissive process, but also highly depended on the material conductivity caused by the different molecular packing. This study not only allows us to clearly understand the relationship between the molecular structures and radioluminescence, but also provides a guidance to rationally design new organic scintillators. Abstract : We present an isomerism strategy to study the effect of molecular structures on radioluminescence. Under UV‐light excitation, all isomers showed bright phosphorescence with an efficiency of up to 22.8 %. Unexpectedly, both m ‐BA and p ‐BA scintillators showed bright luminescence under X‐ray irradiation, which was ascribed to both excellent electrical conductivity and efficient suppression of non‐radiative decay.