title: Ca(2+)-induced folding of a chiral ditopic receptor based on a Pybox ligand and enhancement of anion recognition.
abstract: A chiral Pybox ligand bearing two urea units was developed for a Ca(2+)-induced folding ligand. 1:1 Ca(2+) complexation of the Pybox ligand afforded chiral foldamer formation with coordination of the urea carbonyls to Ca(2+). The halide-ion affinity of the foldamer was enhanced compared to Ca(2+)-free Pybox ligands.
authors.affiliation: Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Yamamura
authors.forename: Junya
authors.initials: J
authors.lastname: Miyake
authors.forename: Yuki
authors.initials: Y
authors.lastname: Imamura
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Nabeshima
mesh_terms: D000838:Anions / Q000737:chemistry; D002118:Calcium / Q000737:chemistry*; D008024:Ligands; D014508:Urea / Q000737:chemistry*
chemical_list: D000838:Anions; D008024:Ligands; D014508:Urea; D002118:Calcium