Controlling Microstructure in Polymeric Molecular Shuttles: Solvent‐Induced Localization of Macrocycles in Poly(urethane/crown ether) Rotaxanes

Abstract

Localized at the NH group in chloroform, but forced away from the NH group in DMSO: This describes the behaviour of the cyclic units in poly(urethane/crown ether rotaxane)s. The dependency on the solvent results in different microstructures (shown schematically below).