Controlled Supramolecular\nComplexation of Cyclodextrin-Functionalized\nPolymeric Ionic Liquid Brushes

Abstract

The control of molecular interactions between host and\nguest is\nof considerable importance for adsorption and release applications.\nTo address this challenge, polymeric ionic liquid (PIL) brushes were\nprepared via reversible addition–fragmentation chain transfer\npolymerization, where we demonstrate that PILs confer a resistance\nto fouling of the material based on the counterion tunability of PILs.\nThe anion-exchange of poly­(1-vinyl-3-buthylimidazolium bromide) was\nused for the control of the host–guest interactions. Measurement\nof film thickness, contact angle, and surface morphology of the resulting\nsurfaces were used to confirm the structural characteristics of the\ncyclodextrin-functionalized PIL brushes. The PIL brushes with switchable\nproperties protect the immobilized host molecule against undesirable\ninteractions without any morphological changes during storage and\nhas potential application in bioseparation and biosensors.