Ligand-Thickness Effect Leads to Enhanced Preference for Large Anions in Alkali Metal Extraction by Crown Ethers

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Jean-Marie Lehn (Nobel laureate, 1987) suggested ligand thickness to be an important consideration in the design of host molecules for cation recognition. We have recently expanded the role of this simple ligand property by demonstrating a case in which ligand thickness contributes significantly to anion discrimination. It was found that in the extraction of sodium nitrate and perchlorate by a simple crown ether, bis(t-octylbenzo)-14-crown-4 (BOB 14C4), the normal preference for perchlorate is almost completely lost when the complex cation has the open-face sandwich vs. the sandwich structure.

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40 p.

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Haverlock, T.J.; Moyer, B.A. & Sachleben, R.A. July 11, 1999.

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Description

Jean-Marie Lehn (Nobel laureate, 1987) suggested ligand thickness to be an important consideration in the design of host molecules for cation recognition. We have recently expanded the role of this simple ligand property by demonstrating a case in which ligand thickness contributes significantly to anion discrimination. It was found that in the extraction of sodium nitrate and perchlorate by a simple crown ether, bis(t-octylbenzo)-14-crown-4 (BOB 14C4), the normal preference for perchlorate is almost completely lost when the complex cation has the open-face sandwich vs. the sandwich structure.

Physical Description

40 p.

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OSTI as DE00003442

Medium: P; Size: 40 pages

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  • International Solvent Extraction Conference (ISEC '99), Barcelona (ES), 07/11/1999--07/16/1999

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  • Report No.: ORNL/CP-101015
  • Report No.: KC 03 02 02 0
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 3442
  • Archival Resource Key: ark:/67531/metadc683440

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  • July 11, 1999

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  • July 25, 2015, 2:20 a.m.

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  • April 12, 2017, 2:48 p.m.

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Haverlock, T.J.; Moyer, B.A. & Sachleben, R.A. Ligand-Thickness Effect Leads to Enhanced Preference for Large Anions in Alkali Metal Extraction by Crown Ethers, article, July 11, 1999; Tennessee. (digital.library.unt.edu/ark:/67531/metadc683440/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.