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Related Concept Videos

Photoluminescence: Applications01:14

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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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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 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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High-Temperature Dynamic Organic Phosphorescence Based On Cyclodextrins Supramolecular Assemblies.

Yi Chen1, Zhenzhen Xu1, Miao Yu1

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ACS Applied Materials & Interfaces
|April 14, 2025
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This study introduces a novel high-temperature dynamic organic phosphorescence (HTDOP) system using β-cyclodextrins and TPAC. The material exhibits ultralong phosphorescence upon heating, enabling effective overtemperature detection.

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CDs supramolecular assembliesFörster-resonance energy transferafterglow circuit diagnosishigh-temperature dynamic organic phosphorescencehost guest doping

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Area of Science:

  • Materials Science
  • Organic Chemistry
  • Photophysics

Background:

  • Dynamic organic phosphorescent materials are promising for applications.
  • High-temperature dynamic organic phosphorescence (HTDOP) is challenging due to temperature sensitivity.

Purpose of the Study:

  • To develop a stable HTDOP system.
  • To investigate the mechanism of phosphorescence suppression at high temperatures.
  • To explore applications in overtemperature detection.

Main Methods:

  • Assembly of a TPAC@β-CDs complex.
  • Spectroscopic analysis (fluorescence and phosphorescence).
  • Mechanistic studies using 1H NMR and Fourier Transform Infrared Spectroscopy.

Main Results:

  • TPAC@β-CDs shows fluorescence at room temperature and ultralong phosphorescence (up to 567 ms) upon heating.
  • Intermolecular hydrogen bonding suppresses nonradiative relaxation up to 140 °C.
  • Elevated temperatures reduce oxygen quenching, enhancing phosphorescence stability.
  • Color tunability from green to red achieved via Förster resonance energy transfer.
  • The system demonstrates fast and reliable response for overtemperature detection.

Conclusions:

  • A strategy for constructing robust HTDOP systems was developed.
  • The system is suitable for overtemperature trace detection in electronics.
  • This research opens avenues for exploiting HTDOP in various fields.