Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
ACS Appl Mater Interfaces. 2023 Jun 21;15(24):29321-29329. doi: 10.1021/acsami.3c04490. Epub 2023 Jun 8.
Afterglow luminescence has garnered significant attention due to its excellent optical properties. Currently, most afterglow phenomena are produced by persistent luminescence following cessation of the excitation light. However, it remains a challenge to control the afterglow luminescence process due to rapid photophysical or photochemical changes. Here, we develop a new strategy to control the afterglow luminescence process by introducing pyridones as singlet oxygen (O) storage reagents (OSRs), where O can be stored in covalent bonds at relatively low temperatures and released upon heating. The afterglow luminescence properties, including afterglow intensity, decay rate, and decay process, can be tuned flexibly by regulating temperature or OSR structures. Based on the controllable luminescence properties, we devise a new strategy for information security. We believe that such an excellent luminescent system also holds remarkable potential for applications in many other fields.
余晖发光因其优异的光学性能而受到广泛关注。目前，大多数余晖现象是在激发光停止后通过持续发光产生的。然而，由于快速的光物理或光化学反应，控制余晖发光过程仍然是一个挑战。在这里，我们开发了一种新的策略，通过引入吡啶酮作为单线态氧 (O) 存储试剂 (OSR) 来控制余晖发光过程，其中 O 可以在相对较低的温度下以共价键的形式存储，并在加热时释放。通过调节温度或 OSR 结构，可以灵活地调节余晖发光性能，包括余晖强度、衰减率和衰减过程。基于可控的发光性能，我们设计了一种新的信息安全策略。我们相信，这种优异的发光体系在许多其他领域也具有显著的应用潜力。
