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Related Concept Videos

Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

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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.
A pair of electrons in a...
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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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Single-Luminophore Molecular Engineering for Rapidly Phototunable Solid-State Luminescence.

Hao Sun1,2, Zidong Yu3, Chenzi Li2

  • 1Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis & Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China.

Angewandte Chemie (International Ed. in English)
|September 7, 2024
PubMed
Summary

Researchers developed a novel luminophore for rapidly tunable solid-state luminescence. This material exhibits enhanced phosphorescence upon light stimulus in various states, offering potential for advanced imaging and patterning.

Keywords:
Molecular engineeringMolecular motionSolid-state LuminescenceStimuli-Response

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Area of Science:

  • Materials Science
  • Photochemistry
  • Organic Chemistry

Background:

  • Smart materials with light-tunable emission are crucial for advanced applications.
  • Challenges exist in achieving rapid photoresponsivity in solid-state luminescent systems due to molecular stacking limitations.

Purpose of the Study:

  • To develop a novel luminophore with enhanced conformational freedom for rapid phototunable solid-state luminescence.
  • To investigate the photoresponsive and luminescent properties of an ionized persulfurated arene.

Main Methods:

  • Molecular engineering of a single luminophore based on photoexcitation-induced conformational change.
  • Utilizing weak intermolecular aliphatic C-H⋅⋅⋅π interactions.
  • Characterization of phosphorescence in solution, crystal, and amorphous states.

Main Results:

  • A new luminophore exhibiting rapidly enhanced phosphorescence upon irradiation was synthesized.
  • High photoresponsive rates (0.033 s⁻¹ in crystal state) were achieved, surpassing existing systems.
  • Incorporation into polymer systems demonstrated tunable afterglow for dynamic imaging and photopatterning.

Conclusions:

  • Single-luminophore molecular engineering can overcome limitations in solid-state phototunable luminescence.
  • The developed material and mechanism have broad implications for stimuli-responsive condensed functional materials.