Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 258: Issue 3
Steric effects as a basis for improved monovalent cation extraction selectivity in crown ethers
Authors:
R. Gatrone Virginia State University Department of Chemistry and Physics P.O. Box 9078 Petersburg VA 23806 USA

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M. Dietz Argonne National Laboratory Chemistry Division 9700 S. Cass Avenue Argonne IL 60439 USA

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C. Mitchell California State University Fresno Department of Chemistry Fresno CA 93740 USA

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J. Stevens Wilkes University Department of Chemistry Wilkes-Barre PA 18766 USA

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S. Hoffman-Glass Troy State University Department of Chemistry Troy AL 36082 USA

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Pages:
673–676
Online Publication Date:
01 Nov 2004
Publication Date:
17 Dec 2003
Article Category:
Research Article
DOI:
https://doi.org/10.1023/b:jrnc.0000011768.52925.d0
Restricted access

Abstract  

Incorporation into a 20-crown-6 of a bulky substituent capable of impeding cation/anion access to one face of the crown ether cavity is shown to afford compounds exhibiting good extraction selectivity for potassium ion over both alkaline earth cations (Ca2+, Sr2+) and other alkali metal ions (Na+, Cs+), an apparent result of diminished flexibility of the crown ether cavity, inhibition of the formation of extractable sandwich complexes with large cations, and the destabilizing effect of forcing charge-neutralizing counter anions to approach from one face of the crown cavity.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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