Influence of Isomerism on Radioluminescence of Purely Organic Phosphorescence Scintillators

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.

Automated summary

This study explores the impact of molecular structures on radioluminescence in organic scintillators through isomerism strategy, revealing that different isomers exhibit distinct radioluminescence under UV and X-ray irradiation. The research also highlights the importance of material conductivity in influencing radioluminescence, providing valuable insights for the rational design of new organic scintillators.