近日，澳门大学曲松楠团队开发了具有多元响应余辉颜色的碳点三矩阵约束诱导超亮余辉用于高级动态信息加密。2026年3月2日，《德国应用化学》杂志发表了这篇成果。

动态余辉碳点材料能够在激发停止后实现长时发光和动态颜色变化，在高级加密和视觉传感领域具有广阔的应用前景。然而，单一变量响应的余辉颜色变化限制了碳点在复杂环境中进行多维信息编码和动态加密的潜力。

研究组报道了一种无金属碳点材料，该材料具备三重变量响应特性（时间、温度和激发波长），能够呈现多种动态余辉颜色，并具有远超其他余辉材料的超高余辉亮度（406 cd m^-2）。基于三重基质限域与界面效应的协同作用，研究组将室温磷光和热激活延迟荧光集成到单个碳点体系中。得益于双模式余辉（磷光和热激活延迟荧光）不同的寿命及其对温度和激发波长的差异化敏感性，研究组同时实现了时间依赖的余辉颜色、激发依赖的余辉颜色以及热致变色余辉。

最终，他们还设计了一种随时间、温度和激发波长变化的三维响应色码，其颜色可覆盖整个可见光谱。该平台实现了高容量、可编程、全色域且视觉直观的信息加密与显示，为先进的多维防伪和安全通信技术提供了一条前景广阔的路径。

附：英文原文

Title: Triple Matrix Confinement-Induced Ultrabright Afterglow From Carbon Dots With Multivariate Responsive Afterglow Colors for Advanced Dynamic Information Encryption

Author: Yupeng Liu, Yiming Hao, Yi Li, Xiaofan Xia, Xichang Ou, Xue Wu, Jun Wu, Ruifeng Zheng, Dongbo Guo, Shi Chen, Jing Li, Jinyang Zhu, Qijun Li, Songnan Qu

Issue&Volume: 2026-03-02

Abstract: Dynamic afterglow carbon dots (CDs) materials, capable of long-duration emission and dynamic color changes after excitation, hold promise for widespread applications in high-level encryption and visual sensing. However, the single-variable response afterglow color changing limits the potential of CDs for multidimensional information encoding and dynamic encryption in complex environments. Here, we report metal-free CDs with triple-variable responses (time, temperature, and excitation wavelength) for multiple dynamic afterglow colors and an ultra-high afterglow brightness (406 cd m2) far exceeding those of other afterglow materials. Based on the synergistic effect of triple matrix confinement and interface effects, roomtemperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) are integrated into a single CD system. Owing to the different lifetimes of the dual-mode afterglow (phosphorescence and TADF) and their varying sensitivities to temperature and excitation wavelength, time-dependent afterglow colors (TDAC), excitation-dependent afterglow colors (EDAC), and thermochromic afterglow (TCAG) are simultaneously achieved. Finally, we also designed a three-dimensional variable-response color code that varies with time, temperature, and excitation wavelength, spanning the entire visible spectrum. This platform enables high-capacity, programmable, full-gamut, and visually intuitive information encryption and display, providing a promising pathway for advanced, multidimensional anti-counterfeiting and secure communication technologies.

DOI: 10.1002/anie.8266335

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.8266335