Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Abstract The trade‐off between high radioluminescence (RL) and fast decay time is a common challenge facing almost all X‐ray scintillators. Organic fluorescence scintillators, with ultrafast response, readily available, low cost, are promising for imaging detection. Here, organic cocrystals of halogen‐bonded acceptors donors heavy halogen atoms (Br I) designed fabricated to achieve RL simultaneously. noncovalent interactions in play the following roles: 1) strong bonds C≡N···X (X = I, Br) promoted by providing effective pathways electron transfer, whereas relatively weaker C–X···π do not contribute this enhancement. 2) Halogen‐bonded can accelerate decay, resulting as interaction strength increases. 3) π–π modified their molecular packing affect fluorescence. Through modulation these interactions, cocrystal 1,4‐bis‐p‐cyanostyrylbenzene (CSB) 1,4‐diiodotetrafluorobenzene (IFB) exhibited best scintillation performance lifetime 0.58 ns detection limit 144.59 nGy s −1 , achieving resolution 10 lp mm . design combined cocrystallization strategy provides new insights into designing scintillator advanced applications.

Language: Английский