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Aqueous Solution Enhanced Room Temperature Phosphorescence through Coordination-Induced Structural Rigidity.

Li Ya Liang1, Bin Bin Chen1,2, Ya Ting Gao1

  • 1Key Laboratory for Advanced Materials, Shanghai Key Laboratory of Functional Materials Chemistry, Frontiers Science Center for Materiobiology & Dynamic Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China.

Advanced Materials (Deerfield Beach, Fla.)
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Summary
This summary is machine-generated.

Researchers developed aluminum/scandium-doped phosphorescent microcubes (Al/Sc-PMCs) that show enhanced room temperature phosphorescence (RTP) in aqueous solution. This coordination-induced rigidity strategy overcomes solution quenching, enabling new applications for phosphorescent probes.

Keywords:
aqueous solution enhanced phosphorescencecoordination-induced structural rigidityion sensingmetal-based microcubesroom-temperature phosphorescence

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Area of Science:

  • Materials Science
  • Photochemistry
  • Analytical Chemistry

Background:

  • Achieving enhanced room temperature phosphorescence (RTP) in aqueous solutions is crucial for practical applications but remains challenging due to solution-induced quenching.
  • Traditional RTP materials often suffer from decreased luminescence intensity in solution, limiting their use in biological and environmental analyses.

Purpose of the Study:

  • To develop a novel strategy for enhancing RTP intensity of phosphorescent materials in aqueous solution.
  • To investigate the mechanism of coordination-induced structural rigidity for RTP enhancement.
  • To construct a phosphorescent probe for accurate analyte determination in complex biological matrices.

Main Methods:

  • Synthesis of aluminum/scandium-doped phosphorescent microcubes (Al/Sc-PMCs).
  • Investigation of RTP properties in dry and aqueous states.
  • Analysis of the coordination and hydrogen bonding interactions between Al/Sc-PMCs and water molecules.
  • Evaluation of the Al/Sc-PMCs as a phosphorescent probe for analyte determination.

Main Results:

  • Al/Sc-PMCs exhibit significantly enhanced RTP intensity (up to 22.16-fold increase) in aqueous solution, contrary to typical quenching effects.
  • The enhancement is attributed to coordination of water molecules to metal sites (Al³⁺ and Sc³⁺), inducing structural rigidity and suppressing nonradiative decay pathways.
  • The coordinated water molecules act as bridges, forming hydrogen bonds with surface groups, rigidifying the structure and promoting radiative decay.

Conclusions:

  • A novel coordination-induced structural rigidity strategy effectively enhances RTP in aqueous solution.
  • Al/Sc-PMCs demonstrate remarkable luminescence enhancement in water, overcoming solution-quenching limitations.
  • This work provides a robust phosphorescent probe for reliable and accurate analyte detection in complex biological samples.