Photoreversible Fluorescence Modulation of a Rhodamine Dye by Supramolecular Complexation with Photosensitive Cyclodextrin

This is the authors' abstract. We don't add key points for this paper.

A complex light switch: Photoreversible fluorescence modulation was achieved by supramolecular complexation of a guest rhodamine molecule (RhB) with spiropyran-modified cyclodextrin (see picture). Upon UV irradiation, the chromophore within the cyclodextrin cavity can transfer its energy to the spiropyran moiety, while upon visible-light irradiation, no energy transfer occurs. Thus, light can be used to turn “on” and “off” the fluorescence emission of a dye inside the cyclodextrin cavity.