Solvation of exchangeable cations in sulfonated polystyrene ion-exchange resins

An ESR study

M. Naderi, J. A. Dale, G. M.B. Parkes, D. R. Brown

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The solvation of Cu2+ ions in sulfonated poly(styrene-co-divinylbenzene) ion-exchange resins has been studied by electron spin resonance (ESR) spectroscopy. The ESR spectrum of Cu2+ ions in hydrated resins is characteristic of the freely tumbling hexahydrated cation. On dehydration of the gel, the spectrum gradually broadens suggesting that dehydration occurs in a relatively disordered way. Reversible loss of ESR signal intensity is attributed to dipolar interactions between neighbouring Cu2+ ions. In resins fully solvated with methanol, the ESR spectrum is characteristic of the unconstrained, fully solvated Cu2+ ion and, again, on drying, loss of solvent occurs without the formation of any well-defined Cu2+ centres. Similar behaviour is seen for resins solvated with i-propanol and n-butanol.

Original languageEnglish
Pages (from-to)25-31
Number of pages7
JournalReactive and Functional Polymers
Volume51
Issue number1
DOIs
Publication statusPublished - Apr 2002

Fingerprint

Ion Exchange Resins
Ion exchange resins
Polystyrenes
Solvation
Electron Spin Resonance Spectroscopy
electron spin resonance
Paramagnetic resonance
Cations
resin
ion exchange
cation
Positive ions
Ions
ion
Resins
Dehydration
dehydration
Electron spin resonance spectroscopy
Barreling
1-Propanol

Cite this

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title = "Solvation of exchangeable cations in sulfonated polystyrene ion-exchange resins: An ESR study",
abstract = "The solvation of Cu2+ ions in sulfonated poly(styrene-co-divinylbenzene) ion-exchange resins has been studied by electron spin resonance (ESR) spectroscopy. The ESR spectrum of Cu2+ ions in hydrated resins is characteristic of the freely tumbling hexahydrated cation. On dehydration of the gel, the spectrum gradually broadens suggesting that dehydration occurs in a relatively disordered way. Reversible loss of ESR signal intensity is attributed to dipolar interactions between neighbouring Cu2+ ions. In resins fully solvated with methanol, the ESR spectrum is characteristic of the unconstrained, fully solvated Cu2+ ion and, again, on drying, loss of solvent occurs without the formation of any well-defined Cu2+ centres. Similar behaviour is seen for resins solvated with i-propanol and n-butanol.",
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Solvation of exchangeable cations in sulfonated polystyrene ion-exchange resins : An ESR study. / Naderi, M.; Dale, J. A.; Parkes, G. M.B.; Brown, D. R.

In: Reactive and Functional Polymers, Vol. 51, No. 1, 04.2002, p. 25-31.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Solvation of exchangeable cations in sulfonated polystyrene ion-exchange resins

T2 - An ESR study

AU - Naderi, M.

AU - Dale, J. A.

AU - Parkes, G. M.B.

AU - Brown, D. R.

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AB - The solvation of Cu2+ ions in sulfonated poly(styrene-co-divinylbenzene) ion-exchange resins has been studied by electron spin resonance (ESR) spectroscopy. The ESR spectrum of Cu2+ ions in hydrated resins is characteristic of the freely tumbling hexahydrated cation. On dehydration of the gel, the spectrum gradually broadens suggesting that dehydration occurs in a relatively disordered way. Reversible loss of ESR signal intensity is attributed to dipolar interactions between neighbouring Cu2+ ions. In resins fully solvated with methanol, the ESR spectrum is characteristic of the unconstrained, fully solvated Cu2+ ion and, again, on drying, loss of solvent occurs without the formation of any well-defined Cu2+ centres. Similar behaviour is seen for resins solvated with i-propanol and n-butanol.

KW - Copper

KW - ESR

KW - Ion-exchange resin

KW - Solvation

KW - Sulfonated polystyrene

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