Alignment of iodine species in stretched polyacetylene films |
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| Authors: | M Seto Yu Maeda T Matsuyama H Yamaoka H Sakai S Masubuchi S Kazama K Mizoguchi K Kume |
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| Institution: | (1) Research Reactor Institute, Kyoto University, Kumatori, Sennan, 590-04 Osaka, Japan;(2) Department of Chemistry, Hiroshima University, 724 Higashihiroshima, Japan;(3) Department of Physics, Chuo University, 112 Tokyo, Japan;(4) Faculty of Science, Tokyo Metropolitain University, 158 Tokyo, Japan |
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| Abstract: | The129I Mössbauer spectroscopy has been applied to iodine-doped highly conducting polyacetylene. For the unstretched polyacetylene films, the iodine species of I?, I 3 ? and I 5 ? are observed. The polyiodides have symmetrical charge population. In addition to these anions, a small amount of iodines is covalently bonding to the carbon atoms, breaking the double bonds of the main chain. For the stretched polyacetylene films, the measurements were done under the condition that the stretch direction was parallel or perpendicular to the direction of incident ψ-rays. The relative change of the intensities of the Mössbauer quadrupole-split lines reveals the alignment of the polyiodine anions in the stretched film. |
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