title: Fine tuning the anion binding properties of 2,6-diamidopyridine dipyrromethane hybrid macrocycles.
abstract: The synthesis, characterization, and anion-binding properties of a series of 2,6-diamidopyridine dipyrromethane hybrid macrocycles is presented. As part of this work, a new method for effecting the oxidation of dipyrromethane-based macrocycles in organic solvents has been developed. The macrocyclic frameworks presented here stand out because of their ease of synthesis and tunable anion-binding properties. Evidence for anion binding was obtained from UV-vis spectroscopic titrations carried out in acetonitrile. The results clearly indicate that by changing the flexibility, cavity size, and directionality of anion-binding moieties in the macrocyclic framework the anion selectivity may be changed dramatically. These results are in accord with density functional theory molecular modeling calculations performed on one member of the series.
authors.affiliation: Department of Chemistry and Biochemistry and Institute for Cellular and Molecular Biology, 1 University Station--A5300, University of Texas at Austin, Austin, Texas 78712-0165, USA. sessler@mail.utexas.edu
authors.forename: Jonathan L
authors.initials: JL
authors.lastname: Sessler
authors.forename: Evgeny
authors.initials: E
authors.lastname: Katayev
authors.forename: G Dan
authors.initials: GD
authors.lastname: Pantos
authors.forename: Pavel
authors.initials: P
authors.lastname: Scherbakov
authors.forename: Marina D
authors.initials: MD
authors.lastname: Reshetova
authors.forename: Victor N
authors.initials: VN
authors.lastname: Khrustalev
authors.forename: Vincent M
authors.initials: VM
authors.lastname: Lynch
authors.forename: Yuri A
authors.initials: YA
authors.lastname: Ustynyuk