Cucurbituril A Versatile Bead for Polyrotaxane Synthesis

Theodora Krasia, Saghar Khodabakhsh, Doniis Tuncel and Joachim H. G. Steinke 

Cyclodextrins and crownethers are the most widely used macrocycles in the synthesis of rotaxanes and polyrotaxanes. Their popularity benefits from their commercial availability and accessibility of a wide range of functional derivatives that can be obtained in a straightforward manner. Other macrocycles such as cyclophanes have been employed in some rare instances, although their synthesis is more involved and cumbersome. In more recent years a long known macro- 

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