Effect of Component Mobility on the Properties of Macromolecular [2]Rotaxanes

Zhen Chen, Daisuke Aoki, Satoshi Uchida, Hironori Marubayashi, Shuichi Nojima, Toshikazu Takata

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Macromolecular [2]rotaxanes comprising a polymer axle and crown ether wheel were synthesized to evaluate the effect of component mobility on the properties of the axle polymer, especially its crystallinity. Living ring-opening polymerization of δ-valerolactone with a pseudorotaxane initiator with a hydroxy group at the axle terminus was followed by end-capping with a bulky isocyanate. This yielded macromolecular [2]rotaxanes (M2Rs) possessing polyester axles of varying molecular weights. The crystallinity of the axle polymers of two series of M2Rs, with either fixed and movable components, was evaluated by differential scanning calorimetry. The results revealed that the effect of component mobility was significant in the fixed and movable M2Rs with a certain axle length, thus suggesting that the properties of the axle polymer depend on the mobility of the polyrotaxane components.

Original languageEnglish
Pages (from-to)2778-2781
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number8
Publication statusPublished - 2016 Feb 18
Externally publishedYes


  • macromolecular [2]rotaxanes
  • polymers
  • ring-opening polymerization
  • rotaxanes
  • supramolecular chemistry

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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