Hierarchical luminescence center coupling enables time-dependent phosphorescence color from self-protective carbonized polymer dots

Meichao Shi, Qian Gao, Mingxing Chen, Ziwen Lv, Jun Rao, Gegu Chen, Baozhong Lü (), Wei Qi, Junli Ren and Feng Peng ()
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Meichao Shi: Beijing Forestry University
Qian Gao: Beijing Forestry University
Mingxing Chen: Peking University
Ziwen Lv: Beijing Forestry University
Jun Rao: Beijing Forestry University
Gegu Chen: Beijing Forestry University
Baozhong Lü: Beijing Forestry University
Wei Qi: Chinese Academy of Sciences
Junli Ren: South China University of Technology
Feng Peng: Beijing Forestry University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Time-dependent phosphorescence color is attractive for various applications; however, the modulation mechanism of multiple luminescence centers is still confused. Herein, we proposed a hierarchical luminescence center coupling strategy to develop self-protective xylan carbonized polymer dots with time-dependent phosphorescence color. When using 1,3-diaminopropane as the cross-linker, the polymer dots feature a highly stable and rigid architecture, the clusterization-triggered phosphorescence of which is fully exploited to form hierarchical core−shell phosphorescence centers with different afterglow colors. The core with blue afterglow is dominant at first, and the shell with yellow-green afterglow becomes dominant over time, leading to a typical time-dependent phosphorescence color evolution with large color contrast. The eco-friendly xylan carbonized polymer dots with high contrast time-dependent phosphorescence color can be used for advanced dynamic information encryption and anti-counterfeiting. This work provides an effective method to achieve time-dependent phosphorescence color, and gives insights into the phosphorescence mechanism of carbonized polymer dots.

Date: 2025
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DOI: 10.1038/s41467-025-62807-6

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