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J Am Chem Soc. 2003 May 7;125(18):5286-7.

Synthesis and spectroscopic properties of a series of beta-blocked long oligothiophenes up to the 96-mer: revaluation of effective conjugation length.

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  • 1Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.


A series of extraordinarily long oligothiophenes up to the 96-mer has been developed by iterative oxidative coupling of the completely beta-blocked sexithiophene. They are highly conjugated like nonsubstituted oligothiophenes, and the effective conjugation of this system is extended to 96 thiophene units and much longer than that previously speculated for polythiophenes.

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