The ion to water-proton binding time in aqueous ionic solution. An approach using the method of high energy-resolution incoherent quasi-elastic neutron scattering

Philip S. Salmon; Paul B. Lond

doi:10.1016/0921-4526(92)90046-U

The ion to water-proton binding time in aqueous ionic solution. An approach using the method of high energy-resolution incoherent quasi-elastic neutron scattering

Philip S. Salmon, Paul B. Lond

University of East Anglia

Research output: Contribution to journal › Article › peer-review

Abstract

A summary is given of the information which is made available, on the ion to water-proton binding time in aqueous ionic solution, by using the method of high energy-resolution incoherent quasi-elastic neutron scattering (IQENS). A full account is presented of the physical significance of the dynamic hydration number, n_h, which is measured by the method. Results are given for the cation to water-proton binding time, τ₁, in several solutions (Cu²⁺, Zn²⁺, Nd³⁺) for which it has proved difficult or impossible to measure the water exchange rate by using more conventional nuclear magnetic resonance techniques. By investigating the sensitivity of the method to the value of n_h in certain trivalent metal ion solutions (Al³⁺, Ga³⁺, Cr³⁺, Fe³⁺) it has proved possible to place limits on the binding time of second-shell water-protons to the cation and also to gain information on hydrolysis effects.

Original language	English
Pages (from-to)	421-430
Number of pages	10
Journal	Physica B: Physics of Condensed Matter
Volume	182
Issue number	4
DOIs	https://doi.org/10.1016/0921-4526(92)90046-U
Publication status	Published - 1 Dec 1992

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "The ion to water-proton binding time in aqueous ionic solution. An approach using the method of high energy-resolution incoherent quasi-elastic neutron scattering",

abstract = "A summary is given of the information which is made available, on the ion to water-proton binding time in aqueous ionic solution, by using the method of high energy-resolution incoherent quasi-elastic neutron scattering (IQENS). A full account is presented of the physical significance of the dynamic hydration number, nh, which is measured by the method. Results are given for the cation to water-proton binding time, τ1, in several solutions (Cu2+, Zn2+, Nd3+) for which it has proved difficult or impossible to measure the water exchange rate by using more conventional nuclear magnetic resonance techniques. By investigating the sensitivity of the method to the value of nh in certain trivalent metal ion solutions (Al3+, Ga3+, Cr3+, Fe3+) it has proved possible to place limits on the binding time of second-shell water-protons to the cation and also to gain information on hydrolysis effects.",

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The ion to water-proton binding time in aqueous ionic solution. An approach using the method of high energy-resolution incoherent quasi-elastic neutron scattering

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