New fluorene‐based copolymers containing oxadiazole pendant groups: Synthesis,characterization, and polymer stability |
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| Authors: | Dmitrij Bondarev Ji?í Zedník Ji?í Vohlídal Klára Podhájecká Jan Sedlá?ek |
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| Institution: | 1. Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, CZ‐128 40, Prague 2, Czech Republic;2. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06, Prague 6, Czech Republic |
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| Abstract: | A series of fluorene‐based copolymers containing hole blocking/electron transporting diphenyloxadiazole units were synthesized by means of Suzuki‐Miyaura coupling of selected aromatic dibromo‐ and diboronato‐ derivatives catalyzed with a Pd(PPh3)4 catalyst. All of the copolymers with various composition of main‐chain units were characterized by SEC chromatography, NMR, UV–vis, fluorescence and IR spectroscopy, and DSC. The emission stability of fluorene copolymers was improved by the replacement of alkyl groups on the C‐9 carbon of fluorene with aryl groups or by the incorporation of anthracene units into the copolymer main chain. A comparison of luminescence properties of pristine and annealed thin layers of studied copolymers was performed. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 4532–4546, 2009 |
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| Keywords: | annealing catalysis conjugated polymers copolymerization luminescence stability |
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