Matrix immobilization has been proven to be a favored method for enhancing the phosphorescence of carbon dots (CDs), however, it remains a significant challenge to realize time‐dependent phosphorescence colors (TDPC) by embedding CDs with single emission center. In this study, we present a novel matrix‐controlling strategy to regulate the microenvironment of CDs by doping limited Mn2+ in zeolite. The surrounding environment influences the surface state of the CDs, leading to the formation of different excitons. At low temperatures, Mn‐coordinated CDs (C‐CDs) show fast‐decaying green phosphorescence, while non‐coordinated CDs (NC‐CDs) exhibit inherent slow‐decaying blue phosphorescence. Notably, the energy transfer occurs between NC‐CDs and Mn2+ to produce an ultrafast‐decaying red phosphorescence, with the intensity of the red component increasing as the temperature rises. The interplay of these luminescent centers with distinct decay rates activates fascinating multi‐mode TDPC behavior as the temperature changes, resulting in dynamic afterglow evolutions from red to green at 298 K, orange to green at 273 K, and green to cyan to blue at 77 K. Leveraging the diverse luminescence of CDs@MnAPO‐5, a multi‐dimensional dynamic afterglow color pattern was developed for advanced anti‐counterfeiting applications.

中文翻译：

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沸石中碳点的约束微环境调控用于多模式时间依赖性磷光颜色演变


基质固定化已被证明是增强碳点 （CD） 磷光的常用方法，然而，通过将 CD 嵌入具有单个发射中心来实现时间依赖性磷光颜色 （TDPC） 仍然是一个重大挑战。在这项研究中，我们提出了一种新的基质控制策略，通过在沸石中掺杂限制的 Mn2 + 来调节 CDs 的微环境。周围环境会影响 CDs 的表面状态，导致形成不同的激子。在低温下，Mn 配位 CD （C-CDs） 表现出快速衰减的绿色磷光，而非配位 CD （NC-CD） 表现出固有的缓慢衰减蓝色磷光。值得注意的是，能量转移发生在 NC-CDs 和 Mn2+ 之间，以产生超快衰减的红色磷光，红色成分的强度随着温度的升高而增加。随着温度的变化，这些具有不同衰减速率的发光中心相互作用，激活了迷人的多模式 TDPC 行为，导致动态余辉在 298 K 时从红色演变为绿色，在 273 K 时从橙色演变为绿色，在 77 K 时从绿色演变为青色到蓝色。利用 CDs@MnAPO-5 的多样化发光，为高级防伪应用开发了多维动态余辉颜色图案。