Influence of Isomerism on Radioluminescence of Purely Organic Phosphorescence Scintillators
Chaomin Dong, Xiao Wang, Wenqi Gong, Wenbo Ma, Meng Zhang, Jingjie Li, Yuan Zhang, Zixing Zhou, Zhijian Yang, Shuli Qu, Qian Wang, Zhu Zhao, Guohui Yang, Anqi Lv, Huili Ma, Qiushui Chen, Huifang Shi, Yang Yang, Zhongfu An
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.