Synonyms
Mechanically interlocked molecules
Definition
Polyrotaxanes are defined as molecular assemblies, in which many macrocycles are mechanically interlocked on a dumbbell-shaped molecule by bulky stoppers on its ends.
Introduction
Macrocycles rotate freely and translate on the axis in a dumbbell-shaped molecule in the rotaxane system. Since rotaxanes are one of the important components of molecular machines based on such structural features, rotaxanes have attracted increasing interest of researchers from nanotechnological aspects. The first artificial rotaxane was reported in 1967 [1]. Harrison et al. synthesized a [2]rotaxane (two in brackets indicates the number of components) by statistical reaction between a macrocycle and a dumbbell-shaped molecule. However, the yield of single reaction was very low. Harada et al. reported the first example of a polyrotaxane, in which a number of α-cyclodextrin (α-CD) molecules are interlocked on a poly(ethylene glycol) (PEG) chain by bulky...
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References
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Yamaguchi, H., Harada, A. (2015). Polyrotaxanes: Synthesis, Structure, and Chemical Properties. In: Kobayashi, S., Müllen, K. (eds) Encyclopedia of Polymeric Nanomaterials. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29648-2_47
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