A novel,conjugated polymer containing fluorene,pyridine and unsymmetric carbazole moieties: Synthesis,protonation and electrochemical properties |
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| Authors: | Der-Jang Liaw Kun-Li Wang Sidharam Pundlik Pujari Ying-Chi Huang Bo-Cheng Tao Min-Hung Chen Kueir-Rarn Lee Juin-Yih Lai |
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| Affiliation: | 1. Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan;2. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan;3. R&D Center for Membrane Technology, Department of Chemical Engineering, Chung Yuan University, Chung-Li 32023, Taiwan;1. Institute of Synthetic Chemistry, Kaunas University of Technology, Radvil?n? pl. 19, LT-50254 Kaunas, Lithuania;2. Department of Organic Chemistry, Kaunas University of Technology, Radvil?n? pl. 19, LT-50254 Kaunas, Lithuania;3. Department of Solid State Electronics, Vilnius University, Saul?tekio 9, LT-10222 Vilnius, Lithuania;1. Anadolu University, Faculty of Science, Department of Physic, 26470 Eski?ehir, Turkey;2. Eski?ehir Osmangazi University, Faculty of Arts and Science, Department of Chemistry, 26480 Eski?ehir, Turkey;3. Eski?ehir Osmangazi University, Graduate School of Sciences, 26480 Eski?ehir, Turkey |
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| Abstract: | An optically active, conjugated polymer bearing unsymmetric pendant carbazole chromophores was prepared via the Suzuki coupling of 9,9-dioctylfluorene-2,7-diboronic acid and a novel pyridine-containing compound. The polymer had a Tg of 192 °C and Td10 at 437 °C under a nitrogen atmosphere and exhibited absorption bands at 320–400 nm and displayed an additional absorption bands at 380–480 nm after protonation with aq. HCl solution. The photoluminescence of the polymer shifted from 360–460 nm to 460–560 nm after protonation and the photoluminescence quantum yield of the polymer in THF solution was 0.88. The emission color of the polymer film changed from blue (439 nm) to yellow (551 nm) under an applied bias voltage of 2.5 V. |
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