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Advanced Compositional Analysis of Nanoparticle-polymer Composites Using Direct Fluorescence Imaging
Published on: July 19, 2016
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Confinement-Modulated Clusterization-Triggered Time-Dependent Phosphorescence Color from Xylan-Carbonized Polymer
Meichao Shi1, Qian Gao1, Jun Rao1
1Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
Journal of the American Chemical Society
|December 6, 2023
Summary
Researchers created unique carbonized polymer dots from xylan waste, achieving time-dependent phosphorescence color (TDPC) for advanced applications. This breakthrough offers a sustainable route to novel luminescent materials.
Area of Science:
- Materials Science
- Organic Chemistry
- Nanotechnology
Background:
- Achieving time-dependent phosphorescence color (TDPC) in organic materials is challenging due to nonradiative decay and triplet state modulation.
- Developing sustainable materials from waste products is a key environmental and economic goal.
Purpose of the Study:
- To utilize xylan, a paper mill waste, for creating carbonized polymer dots (CPDs) with clusterization-triggered room-temperature phosphorescence (RTP).
- To engineer CPDs for tunable triplet energy levels and achieve stable, time-dependent color emission.
- To explore the application of these novel phosphorescent materials in imaging and security.
Main Methods:
- Xylan was processed into carbonized polymer dots (CPDs).
- CPDs were confined within silica matrices to activate specific emissive centers.
- The phosphorescence properties, including lifetimes and color evolution, were characterized.
- Stability tests were performed by soaking in water.
- Applications in hydrogel imaging and information encryption were demonstrated.
Main Results:
- CPDs derived from xylan exhibited clusterization-triggered room-temperature phosphorescence (RTP).
- Confined CPDs showed coexisting blue (425.6 ms lifetime) and green (1506 ms lifetime) emissive centers, enabling time-dependent phosphorescence color (TDPC) evolution from blue to green.
- The TDPC properties remained stable in water for over a month.
- Successful applications were demonstrated in hydrogel location/deformation imaging and dynamic information encryption/anticounterfeiting.
Conclusions:
- Xylan-based CPDs offer a sustainable pathway to achieve tunable and stable time-dependent phosphorescence color (TDPC).
- The developed materials show significant potential for advanced applications in imaging, security, and anticounterfeiting.
- This work highlights the value of utilizing paper mill waste for high-performance functional materials.
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