Full-color-tunable ultralong afterglow is significant for high-level information encryption. Herein, we report such an afterglow from a polymer synthesized via one-step anionic hybrid copolymerization of maleimide and N,N-dimethylaminopropylacrylamide. The polymer film exhibits an optimal delayed emission wavelength varying from 428 to 629 nm with a duration of afterglow of up to 4 s under ambient conditions. Particularly, the afterglow is pH-responsive. Our study reveals that the unique afterglow originates from the concurrence of three distinct delayed emission modes, i.e., persistent room-temperature phosphorescence, thermally activated delayed fluorescence, and delayed fluorescence through Förster-resonance energy transfer. This present study provides a facile approach to developing high-performance afterglow materials for information encryption and decryption.

中文翻译：

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基于具有三模式延迟发射的单一聚合物荧光粉的全色可调和 pH 响应超长余辉


全色可调超长余辉对于高级信息加密具有重要意义。在此，我们报道了通过马来酰亚胺和 N,N-二甲基氨基丙基丙烯酰胺一步阴离子杂化共聚合成的聚合物的这种余辉。该聚合物薄膜表现出最佳的延迟发射波长，范围为 428 至 629 nm，在环境条件下余辉持续时间长达 4 秒。特别是，余辉是 pH 响应的。我们的研究表明，独特的余辉源自三种不同的延迟发射模式的同时存在，即持续室温磷光、热激活延迟荧光和通过福斯特共振能量转移产生的延迟荧光。本研究提供了一种开发用于信息加密和解密的高性能余辉材料的简便方法。