Polyrotaxanes Having Cyclodextrin Nanotubes as The Wheel Components

Polyrotaxanes Having Cyclodextrin Nanotubes as The Wheel Components 

Yui s group analyzed the thermodynamics on the inclusion complexation between the a-cyclodextrin-based nanotube and sodium alkyl sulfonate [148]. They prepared a supramolecular hydrogel utilizing enthalpy-driven complexation between the molecular tube and an amphiphilic molecule [147]. They carried out the thermodynamic analysis of inclusion complexation between a-cyclodextrin-based molecular tube and poly(ethylene oxide)-Wocfc-poly(tetrahydrofuran)-b/oc/c-poly(ethylene oxide) triblock copolymer in terms of isothermal titration calorimetry [157]. Furthermore, they incorporated the tube into gels that could recognize the length of alkyl chain [158]. 

Liu et al. synthesized a bis(molecular tube) from organoselenium-bridged /J-cyclodextrin-Pt(IV) complex and propylene glycol, utilizing Harada s protocol and they characterized the tube by TEM and AFM [159]. 

An insulated molecular wire was prepared by Ito s group from the a-cy-clodextrin-based molecular tube and polyaniline with emeraldine base [164]. They found that the insulated wire was moved and cut off by manipulating with the cantilever tip of AFM [165]. 

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