Anion exchange of metal complexes. XVII. The selective swelling of the exchanger in mixed aqueous-organic solvents

Y. Marcus*, J. Naveh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The swelling of Dowex-1 anion exchangers of cross-linking 4, 8, and 16% DVB was measured in several organic solvents and their aqueous mixtures for the chloride and perchlorate ionic forms. For the pure solvents and chloride form resins swelling decreases in the order water > formamide > methanol > ethanol > acetonitrile > 1-propanol > 2-propanol > acetone > dioxane. The perchlorate form shows altogether less swelling, and relatively high swelling by formamide and dimethylformamide. In mixed aqueous-organic solvents preferential swelling by the alcohols is found at the lowest mole fractions and by water over most of the composition range. The amides and methanol show rather little preference for swelling by either water or the organic solvent. Most of the observed phenomena can be explained by the effects of the organic solvent on the structure of water outside the resin, and by preferential ion-solvation effects.

Original languageEnglish
Pages (from-to)591-596
Number of pages6
JournalJournal of Physical Chemistry
Volume73
Issue number3
DOIs
StatePublished - 1969

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