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Related Concept Videos

Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
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Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
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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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Thermal Curing-Enhanced Circularly Polarized Phosphorescence.

Shouchang Jiao1, Rui Du1, Jingcheng Wang1

  • 1Shandong Key Laboratory of Renewable Membrane Materials, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.

Molecules (Basel, Switzerland)
|June 12, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed new chiral materials for enhanced circularly polarized phosphorescence (CPP) with long afterglow. These materials offer advanced multi-dimensional anticounterfeiting solutions with high security.

Keywords:
anti-counterfeitingcircularly polarized phosphorescencemulticolor afterglowroom-temperature phosphorescence

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Published on: October 24, 2017

Area of Science:

  • Materials Science
  • Organic Chemistry
  • Photophysics

Background:

  • Developing circularly polarized phosphorescence (CPP) materials with long-afterglow room-temperature phosphorescence (RTP) and chirality is highly desirable but faces significant challenges.
  • Existing methods often struggle to integrate these properties effectively, limiting applications in advanced optical materials.

Purpose of the Study:

  • To develop a facile and efficient strategy for enhancing CPP by incorporating chiral dopants into a robust polymer matrix.
  • To investigate the impact of a rigid crosslinked network on phosphorescence properties and chiral optical signals.
  • To explore the application of these novel materials in high-security anticounterfeiting technologies.

Main Methods:

  • Doping chiral naphthyl phosphoric acid derivatives (BNP-CZ, BNP-DPA, BNP-TPA) into a thermally cured Bisphenol A Epoxy Resin (DGEBA) matrix crosslinked with 1,8-diaminooctane (DAO).
  • Characterization of phosphorescence lifetime, photoluminescence quantum yield, and circularly polarized luminescence.
  • Evaluation of material performance in multi-dimensional anticounterfeiting applications.

Main Results:

  • The rigid crosslinked network effectively suppressed nonradiative transitions, leading to a long phosphorescence lifetime (up to 973 ms) and high photoluminescence quantum yield (26.55%).
  • BNP-CZ@DAO demonstrated significantly boosted CPP signals and a unique switch from circularly polarized fluorescence (CPF) in solution to CPP in the solid state.
  • The developed polymers exhibited excellent performance in multi-dimensional anticounterfeiting due to their long afterglow and chiral optical properties.

Conclusions:

  • A universal and scalable approach for creating high-performance CPP materials with integrated long afterglow and chirality has been established.
  • The developed materials show great promise for advanced anticounterfeiting applications requiring high security and unique optical signatures.
  • This strategy provides a foundation for designing next-generation chiral luminescent materials.