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Journal of Polymer Research

, 26:30 | Cite as

Synthesis and properties of copolyarylenes containing indolo[3,2-b]carbazole moieties in the backbone

  • Oana Iuliana Negru
  • Mircea Grigoras
ORIGINAL PAPER
  • 14 Downloads

Abstract

Three novel indolo[3,2-b]carbazole-based copolyarylenes were synthesized by Suzuki polycondensation of 6,12-di(4-bromophenyl)-5,11-dihydroindolo[3,2-b]carbazole with 2,5-thiophene diboronic acid, 2,5-bis(hexyloxy)phenyl-1,4-diboronic acid and 9,9-dihexylfluorene-2,7-diboronic acid bis(1,3-propanediol)ester. The molecular structure of the polymers was examined by FTIR, proton and carbon nuclear magnetic resonance spectroscopy methods. Their number average molecular weights range from 6300 to 8400 g·mol−1 and polydispersity indices are in the range 1.80–2.05. Thermal properties were studied by differential scanning calorimetry and thermogravimetric analysis. The photophysical and electrochemical properties were studied by UV-vis absorption spectroscopy, fluorescence spectroscopy and electrochemical methods. The results reveal that all polymers have high thermal stability with decomposition temperatures of 328 °C (P1), 350 °C (P2) and 378 °C (P3) and good electrochemical properties (high HOMO energy levels, air redox stability).

Graphical abstract

TGA curves of the polymers P1, P2 and P3.

Keywords

Polyarylenes Indolo[3,2-b]carbazoles Optoelectronic properties Cyclic voltammetry 

Notes

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Copyright information

© The Polymer Society, Taipei 2019

Authors and Affiliations

  1. 1.Electroactive Polymers Department“P. Poni” Institute of Macromolecular ChemistryIasiRomania

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