Pillar[5]arene-based nonionic polyrotaxanes and a topological gel prepared from cyclic host liquids.

We synthesize nonionic polymer-based polyrotaxanes in solvent systems based on pillar[5]arene cyclic host liquids. Using a reactive liquid, pillar[5]arene enabled synthesis of a nonionic topological gel.

Cyclic host liquids for facile and high-yield synthesis of [2]rotaxanes.

We developed "cyclic host liquids (CHLs)" as a new type of solvent. The CHLs are a nonvolatile liquid over a wide temperature range, are biocompatible and recyclable, have high thermal stability, and are miscible with many organic solvents. Compared with typical complexation systems, the CHL system is extremely efficient for maintaining host-guest complexation because an additional solvent is not required.