Enabling robust and hour-level organic long persistent luminescence from carbon dots by covalent fixation  

作　　者：Kai Jiang Yuci Wang Cunjian Lin Licheng Zheng Jiaren Du Yixi Zhuang Rongjun Xie Zhongjun Li Hengwei Lin 

机构地区：[1]International Joint Research Center for Photo-responsive Molecules and Materials,School of Chemical and Material Engineering,Jiangnan University,214122 Wuxi,China [2]College of Chemistry,Zhengzhou University,450001 Zhengzhou,China [3]State Key Laboratory of Physical Chemistry of Solid Surface,Fujian Provincial Key Laboratory of Materials Genome,and College of Materials,Xiamen University,361005 Xiamen,China

出　　处：《Light(Science & Applications)》2022年第4期686-696,共11页光（科学与应用)（英文版）

基　　金：the National Natural Science Foundation of China(52003284,51872300,and U1832110);the China Postdoctoral Science Foundation(BX20190338);the S&T Innovation 2025 Major Special Programme of Ningbo(2018B10054)for financially supporting this work.

摘　　要：The first carbon dot(CD)-based organic long persistent luminescence(OLPL)system exhibiting more than 1 h of duration was developed.In contrast to the established OLPL systems,herein,the reported CDs-based system(named m-CDs@CA)can be facilely and effectively fabricated using a household microwave oven,and more impressively,its LPL can be observed under ambient conditions and even in aqueous media.XRD and TEM characterizations,afterglow decay,time-resolved spectroscopy,and ESR analysis were performed,showing the successful composition of CDs and.CA,the formation of exciplexes and long-lived charged-separated states.Further studies suggest that the production of covalent bonds between CA and CDs plays pivotal roles in activating LPL and preventing its quenching from oxygen and water.To the best of our knowledge,this is a very rare example of an OLPL system that exhibits hourlevel afterglow under ambient conditions.Finally,applications of m-CDs@C.A in glow-in-the-dark paints for emergency signs and multicolored luminous pearls were preliminarily demonstrated.This work may provide new insights for the development of rare earth-free and robust OLPL materials.

关 键 词：LUMINESCENCE system AMBIENT 

分 类 号：O43[机械工程—光学工程]