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Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

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Published on: April 16, 2018

Stable Persistent Room-Temperature Phosphorescent Hydrogels Based on Ionically Crosslinked Nonaromatic Carboxylate

Jinsheng Xiao¹, Junwen Deng¹, Xiushan Wang¹

¹Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, China.

Small (Weinheim an Der Bergstrasse, Germany)

|September 2, 2024

Summary

Novel nonaromatic hydrogels offer stable, long-lasting room-temperature phosphorescence (RTP) with tunable colors. These advanced materials overcome limitations of traditional phosphorescent hydrogels, enabling new applications.

Keywords:

hydrogel ionically crosslinked nonaromatic luminogens room‐temperature phosphorescence stable phosphorescence emission

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Area of Science:

Materials Science
Polymer Chemistry
Photophysics

Background:

Developing organic room-temperature phosphorescent (RTP) hydrogels is crucial for advanced material applications.
Existing RTP hydrogels often exhibit short lifetimes, poor underwater stability, and complex synthesis.

Purpose of the Study:

To create novel nonaromatic RTP hydrogels with enhanced stability and performance.
To overcome the limitations of conventional aromatic phosphorescent hydrogels.

Main Methods:

Utilized sodium alginate and a polymeric carboxylate as non-traditional luminescent polymers.
Employed ionic crosslinking between carboxylate groups and calcium ions.
Prepared hydrogel fibers using a wet spinning technique.

Main Results:

Achieved color-tunable RTP emissions with ultra-long lifetimes up to 451.1 ms.
Demonstrated excellent anti-swelling properties and stable RTP emission in water for extended periods.
Successfully prepared hydrogel fibers efficiently and at a large scale.

Conclusions:

The developed nonaromatic hydrogels provide a stable and persistent RTP emission.
Ionic crosslinking and through-space interactions are key to the enhanced photophysical properties.
This strategy offers a reliable method for designing advanced nonaromatic hydrogels.