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Solvation of exchangeable cations in sulfonated polystyrene ion-exchange resins: an ESR study

Naderi, M., Dale, J.A., Parkes, Gareth M.B and Brown, D.R. (2002) Solvation of exchangeable cations in sulfonated polystyrene ion-exchange resins: an ESR study. Reactive and Functional Polymers, 51 (1). p. 25. ISSN 1381-5148

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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.

Item Type: Article
Subjects: Q Science > QD Chemistry
Schools: School of Applied Sciences
School of Applied Sciences > Materials and Catalysis Research Centre
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Depositing User: Catherine Parker
Date Deposited: 25 Sep 2008 14:57
Last Modified: 17 Oct 2008 14:49
URI: http://eprints.hud.ac.uk/id/eprint/2015

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