Nuclear Magnetic Resonance Studies of Some Cation- and Anion-Exchange Resins in Dimethyl Sulfoxide-Water Systems

Nancy Ma Wu, Theodore I. Malinin

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Nuclear magnetic resonance (NMR) data were reported for AG 50W,H+ cation-exchange resin and AG1, Cl- anion-exchange resin suspended in DMSO-water mixtures. An increase in concentration of DMSO from 1.06 M to 13.4 M produced an upfield shift for external water peaks from T 5.19 to T 6.12 and a downfield shift from T 3.62 to T 0.30 for internal water peaks in AG 50W. For AG1, Cl- resin, an upfield shift was also observed with the increase in DMSO concentration. The behavior of chemical shifts in these resins was explained in terms of the strong interaction between DMSO and water molecules and the influence of aromatic nuclei in the resin. The longitudinal relaxation times went through minima in these resins at a mole fraction of water 0.6 ≈ 0.7, indicating the formation of DMSO‧2H2O complex.

Original languageEnglish (US)
Pages (from-to)186-189
Number of pages4
JournalAnalytical Chemistry
Volume52
Issue number1
DOIs
StatePublished - Jan 1 1980

ASJC Scopus subject areas

  • Analytical Chemistry

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