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A Single Carbon-Dot System Enabling Multiple Stimuli Activated Room-Temperature Phosphorescence.

Hao Sun1, Lulu Zhou1, Ruoqu Gong2

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|April 27, 2023
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Summary

Researchers developed novel carbon dots (CDs) exhibiting room-temperature phosphorescence (RTP) activated by multiple stimuli. This breakthrough enables advanced applications in imaging, security, and data encryption using multifunctional nanomaterials.

Keywords:
carbon dotsluminescent anticounterfeitingpersulfurated areneroom-temperature phosphorescencestimuli response

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Area of Science:

  • Nanomaterials
  • Luminescence
  • Organic Chemistry

Background:

  • Room-temperature phosphorescent carbon dots (RTPCDs) offer unique time-resolved luminescence.
  • Achieving multiple stimuli-activated RTP on carbon dots remains a significant challenge.
  • Developing such systems is crucial for complex phosphorescent applications.

Purpose of the Study:

  • To engineer a single carbon-dot system (S-CDs) with multiple stimuli-responsive phosphorescent activation.
  • To investigate the role of specific functional groups in achieving tunable RTP.
  • To demonstrate the potential of these S-CDs in advanced applications.

Main Methods:

  • Synthesized S-CDs using persulfurated aromatic carboxylic acid as a precursor.
  • Introduced aromatic carbonyl groups and sulfur atoms to promote intersystem crossing.
  • Investigated RTP activation by light, acid, and thermal stimuli in solution and film states.

Main Results:

  • Successfully developed S-CDs exhibiting tunable RTP characteristics.
  • Demonstrated that functional surface groups enable activation by multiple stimuli.
  • Achieved multistimuli responsive phosphorescence in a single carbon-dot system.

Conclusions:

  • The developed S-CDs offer a novel platform for multifunctional nanomaterials.
  • The strategy enables complex and highly regulatable phosphorescent applications.
  • S-CDs show promise for photocontrolled imaging, anticounterfeiting, and information encryption.