title: Tetrakis(imidazolium) macrocyclic receptors for anion binding.
abstract: New (tetrakis)imidazolium macrocyclic receptor systems of variable cavity size have been synthesised by stepwise alkylation reactions of bis(imidazolium) precursor compounds. Proton NMR titration studies reveal the macrocycles to strongly bind halide and benzoate anions, with two receptor systems displaying notable selectivity for fluoride in competitive acetonitrile-water (9:1) solvent media.
authors.affiliation: Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR.
authors.forename: Wallace W H
authors.initials: WW
authors.lastname: Wong
authors.forename: Matthew S
authors.initials: MS
authors.lastname: Vickers
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Cowley
authors.forename: Rowena L
authors.initials: RL
authors.lastname: Paul
authors.forename: Paul D
authors.initials: PD
authors.lastname: Beer
mesh_terms: D000838:Anions / Q000032:analysis* / Q000737:chemistry; D001565:Benzoates / Q000032:analysis; D001665:Binding Sites; D006219:Halogens / Q000032:analysis; D007093:Imidazoles / Q000138:chemical synthesis / Q000737:chemistry*; D047028:Macrocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D017186:Titrimetry
chemical_list: D000838:Anions; D001565:Benzoates; D006219:Halogens; D007093:Imidazoles; D047028:Macrocyclic Compounds