余辉
材料科学
掺杂剂
光化学
激发态
密度泛函理论
环氧树脂
兴奋剂
含时密度泛函理论
原子物理学
复合材料
光电子学
化学
计算化学
物理
天文
伽马射线暴
作者
Yonghao Su,Xin Jin,Jianhua Su,Yunjiang Feng,Qiaochun Wang,Zhiyun Zhang,He Tian,Xiang Ma
标识
DOI:10.1002/adom.202300604
摘要
Abstract Developing radical‐induced afterglow emission under ambient conditions is challenging since newly formed radical species are susceptible to air and water. In this work, long afterglow materials (up to 4 s) are realized by doping a series of N,N’ ‐diaryl‐5,10‐dihydrophenazine ( DPP )derivatives into rigid cycloaliphatic epoxy resins ( CER ). The afterglow is found to result from the interaction between the matrix and the excited states of the dopants through the generation of radical species under continuous UV excitation, which can be regulated by the peripheral functional groups of the N ‐phenyl substituents. Density functional theory (DFT) calculations predict that the introduction of electron‐withdrawing groups hinders the afterglow emission, which may be related to the reducing reduction potential and inefficient spin‐orbit coupling (SOC) coefficients. The afterglow emission of the radical‐based systems demonstrates a bright opportunity for information encryption, anti‐counterfeiting, and photolithography.
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