Synthesis of high-performance triphenylamine-based polyfluorenes via C–N coupling reaction: thermal and photoelectric properties


Aromatic high-performance triphenylamine-based polyfluorenes (PTPAFs) have been successfully constructed by palladium-catalyzed polycondensation reaction. The chemical structures of the resulting PTPAFs are confirmed by means of Fourier-transform infrared spectroscopy and nuclear magnetic resonance, and the testing results showed a good agreement with the proposed structures. The resulted polymers show excellent solubility, high thermal stability with the decomposition temperatures (Td5%) over 320 °C and the glass transition temperatures (Tg) over 305 °C. The PTPAF1 and the PTPAF2 exhibit the enhanced high occupied molecular orbital (HOMO) energy levels (− 3.93 eV, − 4.00 eV, respectively) and the depressed low unoccupied molecular orbital (LUMO) energy levels (− 0.99 eV, − 1.41 eV, respectively). Owing to their special structures, PTPAFs showed encouraging photonic luminescence and good electroactivity and could be used as a potential light source in the blue region.

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This research was financially supported by the National Natural Science Foundation of China (No. U1233202 and No. 51175434); the Youth Research Foundation of the Civil Aviation Flight University of China (No. Q2019-106), the Laboratory Research Foundation for the State Key Laboratory of Environment-friendly Energy Materials (No. 17kffk03).

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Xu, Y., Yang, N., He, Q. et al. Synthesis of high-performance triphenylamine-based polyfluorenes via C–N coupling reaction: thermal and photoelectric properties. Polym. Bull. 77, 5145–5154 (2020).

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  • High-performance polymer
  • Palladium-catalyzed amination reaction
  • Triphenylamine
  • Polyfluorene