Dielectric relaxation of liquid-crystalline polyrotaxane

A. Inomata, H. Ishibashi, T. Nakajima, Y. Sakai, M. Kidowaki, T. Shimomura, K. Ito

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A new supramolecular system, liquid-crystalline polyrotaxane (LCPR), has been recently prepared by introduction of 4-cyano-4′-n-pentylbiphenyl (5CB) groups to the cyclic molecules of a polyrotaxane (PR) consisting of polyethylene glycol (PEG) and α-cyclodextrin (α-CD). Here we measured and compared the dielectric relaxations of PR and LCPR in solid state to investigate molecular motions of α-CD in PR and LCPR. It was found that PR exhibited a single relaxation mode while LCPR had two modes. These results suggested that the relaxation mode in PR would be due to the sliding fluctuation of α-CD along the axis chain and that the other mode in LCPR should arise from the rotational fluctuation of α-CD modified by 5CB.

Original languageEnglish
Article number66004
Issue number6
Publication statusPublished - 2007 Sep 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Inomata, A., Ishibashi, H., Nakajima, T., Sakai, Y., Kidowaki, M., Shimomura, T., & Ito, K. (2007). Dielectric relaxation of liquid-crystalline polyrotaxane. EPL, 79(6), [66004]. https://doi.org/10.1209/0295-5075/79/66004