Small band gap oligothieno[3,4-b]pyrazines

B.P. Karsten, R.A.J. Janssen

Research output: Contribution to journalArticleAcademicpeer-review

32 Citations (Scopus)


The synthesis and the optical and electrochemical properties of thiophene end capped oligo(2,3-alkylthieno[3,4- b]pyrazine)s are presented. The optical absorption rapidly shifts to lower energies with increasing chain length, caused in almost equal amounts by a rise of the HOMO and a lowering of the LUMO levels. The optical band gap of the polymer is estimated to be 1.13 +/- 0.07 eV. Extrapolated redox potentials indicate that the polymer is a small band gap p-type material
Original languageEnglish
Pages (from-to)3513-3516
Number of pages4
JournalOrganic Letters
Issue number16
Publication statusPublished - 2008


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