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Chinese Journal of Organic Chemistry >

0 202604002 - 202604002

DOI: https://doi.org/10.6023/cjoc202604002

ARTICLE

Organic Long Persistent Luminescence Materials in Aqueous Medium

  • 种千惠 ,
  • 王光明 ,
  • 吴国伊 ,
  • 闫倩倩 ,
  • 王标兵 ,
  • 张卡卡
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  • aSchool of Materials Science and Engineering, Changzhou University, Changzhou, 213100;
    bState Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai, 200032
#equal contribution

Received date: 2026-04-01

  Revised date: 2026-05-27

  Online published: 2026-07-14

Supported by

National Natural Science Foundation of China (No. 22475228, 22175194).

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Abstract

The development of aqueous dispersions based on organic long-persistent luminescence (OLPL) materials is of great interest for biomedical applications, yet it is severely hindered by the quenching effects of moisture and oxygen. In this study, we demonstrate a successful aqueous OLPL system by employing a ternary donor-sensitizer-acceptor (DSA) design. Specifically, solid-state OLPL materials exhibiting hour-long afterglow and visible-light-excitable property were constructed by integrating difluoroboron β-diketonate (BF₂bdk) as the sensitizer, N,N,N',N'-tetramethylbenzidine (TMB) as the donor, and 4-methoxyphenyl benzoate (MeOPhB), which serves both as the acceptor and a crystalline host matrix. Taking advantage of the moderate melting point (74°C) of MeOPhB, these solid-state materials were efficiently converted into aqueous dispersions with the assistance of surfactants. Spectral fluorescence microscopy was utilized to verify the crystalline structure of the OLPL microparticles within the dispersion and to capture their emission spectra in situ. The resulting aqueous dispersions maintain the characteristic power-law decay of their luminescence and demonstrate remarkable stability against quenching in water. This resilience is attributed to the protective crystalline MeOPhB matrix, which effectively insulates the charge-separated states from the surrounding aqueous environment. This work not only addresses a critical gap in aqueous OLPL technology but also introduces a versatile platform for transitioning solid-state OLPL materials into water-compatible systems.

Key words： organic long persistent luminescence; room-temperature phosphorescence; difluoroboron β-diketonate; triplet excited states; thermally activated delayed fluorescence

Cite this article

种千惠 , 王光明 , 吴国伊 , 闫倩倩 , 王标兵 , 张卡卡 . Organic Long Persistent Luminescence Materials in Aqueous Medium[J]. Chinese Journal of Organic Chemistry, 0 : 202604002 -202604002 . DOI: 10.6023/cjoc202604002

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