Dielectric relaxation of liquid-crystalline polyrotaxane

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

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

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
JournalEPL
Volume79
Issue number6
DOIs
Publication statusPublished - 2007 Sep 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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