Polymers containing rigid benzodithiophene repeating unit with extended electron delocalization.
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.
Hundt
Nadia
N
Department of Chemistry, University of Texas at Dallas, MS BE26, Richardson, Texas 75083, USA.
Palaniappan
Kumaranand
K
Servello
John
J
Dei
Daniel K
DK
Stefan
Mihaela C
MC
Biewer
Michael C
MC