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您的检索式：作者名="Saixing Tang"
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| 1 | Time-Dependent Afterglow from a Single Component Organic Luminogen显示文摘Pure organic luminogens with long-persistent luminescence have been extensively studied,on account of their fundamental research significance and diverse utilizations in anticounterfeiting,bioimaging,encryption,organic light-emitting diodes,chemo-sensing,etc.However,time-dependent color-tunable afterglow is rarely reported,especially for single-component materials.In this work,we reported an organic luminogen with time-dependent afterglow,namely,benzoyleneurea(BEU),with multiple persistent room-temperature phosphorescence(p-RTP)and thermally activated delayed fluorescence(TADF)in single crystals.While the lifetime of TADF is relatively short(~1.2 ms),those for p-RTP are as long as around 369~754 ms.The comparable but different decay rates of diversified p-RTP emissions endow BEU crystals with obvious time-dependent afterglow.The existence of multiple emissions can be reasonably illustrated by the clustering-triggered emission(CTE)mechanism.Single-crystal structure illustrates that the combination of benzene ring and nonconventional chromophores of ureide helps facilitate divergent intermolecular interactions,which contribute to the formation of varying emissive species.Moreover,its methyl-and chloro-substituted derivatives show similar multiple p-RTP emissions.However,no time-dependent afterglows are observed in their crystals,due to the highly approaching lifetimes.The afterglow color variation of BEU crystals grants its applications in advanced anticounterfeiting field and information encryption. | Tianjia Yang Yunzhong Wang Jixuan Duan Shuangyu Wei Saixing Tang Wang Zhang Yuan | 2021 | Research2021，，1： | 0 |
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