Phosphorescence Energy Transfer: Ambient Afterglow Fluorescence from Water-Processable and Purely Organic Dyes via Delayed Sensitization

Angewandte Chemie
Suman Kuila, Subi J George

Abstract

Ambient afterglow luminescence from metal-free organic chromophores would provide a promising alternative to the well-explored inorganic phosphors. However, the realization of air-stable and solution-processable organic afterglow systems with long-lived triplet or singlet states remains a formidable challenge. In the present study, a delayed sensitization of the singlet state of organic dyes via phosphorescence energy transfer from organic phosphors is proposed as an alternative strategy to realize "afterglow fluorescence". This concept is demonstrated with a long-lived phosphor as the energy donor and commercially available fluorescent dyes as the energy acceptor. Triplet-to-singlet Förster-resonance energy-transfer (TS-FRET) between donor and acceptor chromophores, which are co-organized in an amorphous polymer matrix, results in tuneable yellow and red afterglow from the fluorescent acceptors. Moreover, these afterglow fluorescent hybrids are highly solution-processable and show excellent air-stability with good quantum yields.

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Citations

Jan 16, 2021·Angewandte Chemie·Zijian LiFeng Wang
May 13, 2021·The Journal of Physical Chemistry. a·Xingyu CuiChao Lu
May 12, 2021·The Journal of Physical Chemistry Letters·Weidong QiuShi-Jian Su
Jun 17, 2021·Chemical Communications : Chem Comm·Yu-Juan MaDongpeng Yan
Jun 25, 2021·Chemical Science·Aakash D NidhankarSukumaran Santhosh Babu
Aug 18, 2021·Accounts of Chemical Research·Xin-Kun Ma, Yu Liu
Aug 14, 2020·The Journal of Physical Chemistry. a·Alexei CravcencoKarl Börjesson
Jan 21, 2021·The Journal of Physical Chemistry. a·Shuzo Hirata, Indranil Bhattacharjee

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