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A composite film of optically active poly(3,4-ethylenedioxythiophene) was prepared by electrochemical polymerization in double-stranded DNA as a chiral nematic liquid-crystal field. The polymer film showed a Cotton effect in a circular dichroism spectrum, and it also showed honeycomb morphologies in a scanning electron microscopy image. The chirality of the polymer during the polymerization was preserved even after rigorous washing. The insolubility and infusibility of the polymer film were indispensable for preserving the metastable chiral structure.
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Goto et al. (2005) studied this question.
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