An acid/base responsive side-chain polyrotaxane system with a fluorescent signal†
Abstract
An acid/base-responsive polyrotaxane system was constructed, in which the side chain was modified with a diferrocene-functionalized bistable rotaxane molecular switch via the “CuAAC” click reaction. The reversible subunit shuttling movement of the rotaxane unit in the polymer system in response to external acid/base stimuli was accompanied by visual fluorescence changes.