b-Fluorinated calix[4]pyrrole 1 and calix[5]pyrrole 2, strong, neutral anion-binding agents, were found to transport small anions effectively while overcoming the classical solvation-based Hofmeister anion bias selectivity. These two receptors showed an ability to extract smaller anions (bromide and chloride for 1 and nitrate and fluoride for 2) as effectively as iodide anion into nitrobenzene (NB). The present results also represent a rare example of liquid-liquid extraction of inorganic salts effected using an anion receptor in the absence of a cation co-extractant.
Revised: November 29, 2010 |
Published: April 30, 2003
Citation
Levitskaia T.G., M. Marquez, J.L. Sessler, J.A. Shriver, T. Vercouter, and B.A. Moyer. 2003.Fluorinated Calixpyrroles: Anion-Binding Extractants that Reduce the Hofmeister Bias.Chemical Communications 2003, no. 17:2248-2249.PNNL-SA-38519.doi:10.1039/b306385m