Band-gap engineering of donor-acceptor conjugated polymers

H.A.M. Mullekom, van, J.A.J.M. Vekemans, E.W. Meijer

Research output: Contribution to journalArticleAcademic

8 Citations (Scopus)

Abstract

Three series of alternating donor-acceptor substituted co-oligomers (with different chain length), consisting of pyrrole or thiophene as the electron-rich unit and quinoxaline or 2,1,3,-benzobisthiadiazoles as the electron-deficient unit, were prepd. by Pd-catalyzed Stille coupling methodol. The incremental bathochromic shift of the absorption max. upon chain elongation of the three series of oligomers is less than that of the homo-oligomers of thiophene and pyrrole, which is caused by a diminished dispersion of the LUMO level upon chain elongation. The latter conclusion was drawn after comparing the oxidn.- and redn. behavior of the thiophene/benzothiadiazole oligomers with that of thiophene oligomers. The incremental bathochromic shift shows similarity for all three series of oligomers, which is used as a tool in the band-gap engineering of donor-acceptor substituted conjugated polymers
Original languageEnglish
Pages (from-to)1002-1003
JournalPolymer Preprints
Volume39
Publication statusPublished - 1998

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