Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 6, Pages 1659-1663Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201308462
Keywords
chirality; electrochemistry; helical structures; liquid crystals; polymerization
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (Japan) [20225007, 13370214, 24750219]
- Grants-in-Aid for Scientific Research [25620098, 25246002, 24750219] Funding Source: KAKEN
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Helical carbon and graphite films from helical poly(3,4-ethylenedioxythiophene) (H-PEDOT) films synthesized through electrochemical polymerization in a chiral nematic liquid-crystal (N*-LC) field are prepared. The microscope investigations showed that the H-PEDOT film synthesized in the N*-LC has large domains of one-handed spiral morphology consisting of fibril bundles. The H-PEDOT films exhibited distinct Cotton effects in circular dichroism spectra. The highly twisted N*-LC with a helical pitch of smaller than 1m produced the H-PEDOT film with a highly ordered morphology. The spiral morphologies with left- and right-handed screws were observed for the carbon films prepared from the H-PEDOT films at 800 degrees C and were well correlated with the textures and helical pitches of the N*-LCs. The spiral morphologies of the precursors were also retained even in the graphite films prepared from the helical carbon films at 2600 degrees C.
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