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Permanent link (DOI): https://doi.org/10.7939/R3J30V
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Improving the spectral stability of poly(9,9-dioctylfluorene) (PFO) through the use of aromatic ethers Open Access
- Other title
- Type of item
- Degree grantor
University of Alberta
- Author or creator
Sirtonski, Matthew R.
- Supervisor and department
Veinot, Jonathan (Chemistry)
- Examining committee member and department
Mar, Arthur (Chemistry)
Department of Chemistry
- Date accepted
- Graduation date
Master of Science
- Degree level
Aromatic ethers (AEs) have been combined with poly(9,9-dioctylfluorene) (PFO) to improve spectral stability in PFO systems. Compared to neat PFO, PFO/AE blends were found to have decreased ‘g-bands’ following heating in air. Some were further found to induce and maintain β-phase emission. The PFO/polyphenyl ether (PPE) blend was incorporated into polymer-light emitting diodes exibiting blue electroluminescence and good efficiences.
A new AE monomer (bis(4-bromophenoxy) benzene) was synthesized via iron-mediated nucleophilic aromatic substitution. Random AE/PFO copolymers were synthesized via Yamamoto (PAEFO), and Suzuki-Miyaura (PAEFO-S) cross-couplings of bis(4-bromophenoxy) benzene and 2,7-dibromo-9,9-dioctylfluorene (DOF). Another random AE/PF copolymer (PAEFO-2) was synthesized from bis(4-bromophenyl) ether and DOF via Yamamoto cross-coupling. Increasing the AE content in these polymers was found to decrease the ‘g-band’ and no phase changes were evidenced.
The results show PFOs spectral stability can be improved by both blending and copolymerizing with AEs.
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