Fluoride recognition in ‘super-extended cavity’ calix[4]pyrrolesElectronic supplementary information (ESI) available: synthesis details, NMR and MS, and titration curves. See http://www.rsc.org/suppdata/cc/b0/b003229h/
Abstract
Extended cavity ester (4) and amide (5) calix[4]pyrrole macrocycles have been synthesised and shown to bind fluoride exclusively in deuteriated DMSO solution.