Journal
POLYMER CHEMISTRY
Volume 4, Issue 4, Pages 947-953Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2py20917a
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Funding
- Collaborative Research Program of Institute for Chemical Research, Kyoto University
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
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Direct arylation polycondensation reactions using a simple catalytic system gave eight kinds of bithiophene-based alternating copolymers. The conditions for the reactions of 3,3',4,4'-tetramethylbithiophene with dibromoarylenes were optimized to obtain high-molecular-weight polymers without formation of cross-linked structures. In the reaction of a dibromoarylene containing a reactive C-H bond, a short reaction time (1.5 h) was suitable for preventing side reactions. In contrast, a long reaction time (6 h) gave high-molecular-weight polymers from dibromoarylene monomers without a reactive C-H bond. This polycondensation reaction enables the synthesis of polymers containing dye structures such as diketopyrrolopyrrole and isoindigo, which are applicable as materials for polymer solar cells.
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