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Org Lett. 2009 Oct 1;11(19):4422-5. doi: 10.1021/ol901786z.

Polymers containing rigid benzodithiophene repeating unit with extended electron delocalization.

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  • 1Department of Chemistry, University of Texas at Dallas, MS BE26, Richardson, Texas 75083, USA.


Polymers containing a fused benzodithiophene core with phenylethynyl substituents were prepared. The parent poly[4,8-bis(4-pentylphenylethynyl)benzo[1,2-b:4,5-b']dithiophene] was prepared by a Stille coupling. Copolymers with the new core were also obtained by Stille coupling with dibrominated fluorene and carbazole monomers. The obtained polymers had a lower band gap as compared to the related benzodithiophene cores due to the extended electron conjugation. The polymers were also highly fluorescent as observed by high quantum yields.

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