Facile and efficient formation and dissociation of a pseudo[2]rotaxane by a slippage approach using pillar[5]arene-based cyclic host liquid and solvent

Abstract

A pillar[5]arene-based pseudo[2]rotaxane was synthesized using a slippage method by only heating an axle with bulky valine derivative ends in a cyclic host liquid (CHL), which is liquid at room temperature. The pseudo[2]rotaxane synthesized in a CHL can be converted back to the starting components, i.e., the pillar[5]arene wheel and the axle, by heating in a solvent.