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A Fluorescent Ditopic Rotaxane Ion‐Pair Host
Author(s) -
Denis Mathieu,
Qin Lei,
Turner Peter,
Jolliffe Katrina A.,
Goldup Stephen M.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201713105
Subject(s) - rotaxane , fluorescence , chemistry , ion , selectivity , stereochemistry , crystallography , supramolecular chemistry , crystal structure , biochemistry , organic chemistry , physics , quantum mechanics , catalysis
We report a rotaxane based on a simple urea motif that binds Cl − selectively as a separated ion pair with H + and reports the anion binding event through a fluorescence switch‐on response. The host selectively binds Cl − over more basic anions, which deprotonate the framework, and less basic anions, which bind more weakly. The mechanical bond also imparts size selectivity to the ditopic host.