Chiroptical properties of poly{3,4-bis[(S)-2-methyloctyl]thiophene}

Zhong Biao Zhang, Michiya Fujiki, Masao Motonaga, Hiroshi Nakashima, Keiichi Torimitsu, Hong Zhi Tang

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


The circular dichroism (CD) of a polythiophene in the molecularly dispersed state was observed for the first time. The polythiophene possesses two chiral alkyl side chains (poly{3,4-bis[(S)-2-methyloctyl]thiophene}, PDMOT). The chiroptical properties of this polymer in solution, aggregate, and thin solid film states were investigated. A chirally distorted main-chain conformation in a single molecule of PDMOT accounts for the observed CD spectra in solution and could also be considered as a novel chiral motif in an optically active polymer, besides the highly ordered, intramolecular helical structure and the chiral superstructure resulting from intermolecular π-π stacking. Significant temperature and solvent effects on the CD were also observed in the spectra.

Original languageEnglish
Pages (from-to)941-944
Number of pages4
Issue number3
Publication statusPublished - 2002 Jan 29


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