Red-emitting Delayed Fluorescence Materials Based on Anthraquinone and Triphenylamine
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O644

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National Natural Science Foundation of China (21303001);China Postdoctoral Science Foundation Funded Project (No. 2016M601701));Jiangsu Planned Projects for Postdoctoral Research Funds (No.1501011A)

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    Abstract:

    Three red-emitting delayed fluorescence compounds (1-TPA-AQ,1,4-2TPA-AQ, and 1,8-2TPA-AQ) based on triphenylamine (TPA) α-substituted anthraquinone have been synthesized by Suzuki cross-coupling reactions. The photophysical and electrochemical properties of these compounds have been systematically characterized by theoretical calculations, UV-vis, fluorescence, and cyclic voltammetry (CV) measurements. These compounds have small energy gaps between singlet and triplet (ΔEST) of 0.08 eV, 0.09 eV, and 0.06 eV, highest occupied molecular orbital (HOMO) energy levels of -5.26, -5.23, and -5.27 eV, and lowest unoccupied molecular orbital (LUMO) energy levels of -3.14, -3.10, and -3.10 eV, respectively. 1-TPA-AQ, 1,4-2TPA-AQ, and 1,8-2TPA-AQ exhibit red emission color with peaks at 648, 649, and 636 nm , delayed fluorescent lifetime of 1.6, 2.6, and 2.1 μs, respectively. The results indicate that these compounds may be potential red-emitting delayed fluorescence materials.

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History
  • Received:June 23,2017
  • Revised:September 11,2017
  • Adopted:October 11,2017
  • Online: February 28,2018
  • Published:
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