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Photoluminescence: Applications

Photoluminescence: Applications

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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Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

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Efficient Persistent Luminescence Tuning Using a Cyclodextrin Inclusion Complex as Efficient Light Conversion

Dan Zhao^1,2,3,4,5, Lijun Song^2,3,4,5, Linxi Hou¹

¹College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China.

|October 11, 2021

Summary

This summary is machine-generated.

Researchers developed a new method to tune the color of long persistent luminescence materials. Using rhodamine 6G and cyclodextrin inclusion complexes, they shifted colors from green to orange, offering new possibilities for afterglow phosphors.

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Area of Science:

Materials Science
Photochemistry
Nanotechnology

Background:

Broadening the color palette of long persistent luminescence (LPL) materials is crucial for advanced applications but presents significant scientific challenges.
Current LPL materials often have limited color tunability, restricting their use in diverse technological fields.
Developing efficient light conversion materials is key to achieving desired spectral outputs in LPL systems.

Purpose of the Study:

To develop a novel strategy for fine-tuning the persistent luminescence color of materials.
To investigate the use of rhodamine 6G and cyclodextrin inclusion complexes as light conversion agents for LPL.
To explore the relationship between light conversion agent concentration and the resulting emission color and brightness.

Main Methods:

Synthesized inclusion complexes of rhodamine 6G with (2-hydroxypropyl)-β-cyclodextrin.
Incorporated these complexes into a persistent luminescence material matrix.
Varied the concentration of the inclusion complex to observe changes in luminescence properties.
Measured afterglow decay and initial brightness using specialized equipment.

Main Results:

Successfully tuned the emitting color of the persistent luminescence material from green to orange by adjusting the concentration of the light conversion agent.
Demonstrated that the initial afterglow brightness was 9.65 cd/m².
Observed a gradual decrease in initial afterglow brightness with increasing amounts of cyclodextrin inclusion compound coating.

Conclusions:

The developed strategy effectively broadens the luminescence color of afterglow phosphors using inclusion complexes.
This approach offers a new perspective for designing tunable persistent luminescence materials.
The findings open up new opportunities for LPL materials in various emerging applications, such as lighting, displays, and security features.