A novel polythiophene having an ionic viologen mesogenic side chain at the 3-position was synthesized from a 2,5-dibromo-thiophene derivative by dehalogenative polycondensation using Ni(cod)2. Redox function of the viologen moiety in the polymer was confirmed by cyclic voltammetry. The polymer showed liquid crystalline, electrical conductive and photoelectrical properties.
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Kijima et al. (2000) studied this question.
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