The structure of a supersaturated solution

A neutron scattering study of aqueous urea

R. C. Burton, E. S. Ferrari, R. J. Davey, J. Hopwood, M. J. Quayle, J. L. Finney, D. T. Bowron

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this study a combination of neutron diffraction measurements and empirical potential structure refinement (EPSR) was used to investigate the time-averaged structure of a 0.30 mol fraction solution of urea in water at both 25 and 35 °C. These two temperatures were chosen in order to compare the structure of an undersaturated solution at 35 °C with that of a supersaturated solution at 25 °C. The results indicate that in moving into the supersaturated state the solutions show a significant and unexpected change in the self-aggregation of urea molecules. Urea-urea interactions present in the undersaturated solution become suppressed in the supersaturated region, in favor of interactions between urea and water so that overall the urea becomes more hydrated. Such a change may be viewed as a response of the system to the imposed supersaturation and a factor playing an important role in the observed metastability of the solutions.

Original languageEnglish
Pages (from-to)1559-1565
Number of pages7
JournalCrystal Growth and Design
Volume8
Issue number5
Early online date16 Apr 2008
DOIs
Publication statusPublished - 1 May 2008
Externally publishedYes

Fingerprint

Neutron scattering
ureas
Urea
neutron scattering
Water
Supersaturation
Neutron diffraction
supersaturation
metastable state
water
neutron diffraction
Agglomeration
interactions
Molecules
molecules
Temperature

Cite this

Burton, R. C., Ferrari, E. S., Davey, R. J., Hopwood, J., Quayle, M. J., Finney, J. L., & Bowron, D. T. (2008). The structure of a supersaturated solution: A neutron scattering study of aqueous urea. Crystal Growth and Design, 8(5), 1559-1565. https://doi.org/10.1021/cg700829r
Burton, R. C. ; Ferrari, E. S. ; Davey, R. J. ; Hopwood, J. ; Quayle, M. J. ; Finney, J. L. ; Bowron, D. T. / The structure of a supersaturated solution : A neutron scattering study of aqueous urea. In: Crystal Growth and Design. 2008 ; Vol. 8, No. 5. pp. 1559-1565.
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Burton, RC, Ferrari, ES, Davey, RJ, Hopwood, J, Quayle, MJ, Finney, JL & Bowron, DT 2008, 'The structure of a supersaturated solution: A neutron scattering study of aqueous urea', Crystal Growth and Design, vol. 8, no. 5, pp. 1559-1565. https://doi.org/10.1021/cg700829r

The structure of a supersaturated solution : A neutron scattering study of aqueous urea. / Burton, R. C.; Ferrari, E. S.; Davey, R. J.; Hopwood, J.; Quayle, M. J.; Finney, J. L.; Bowron, D. T.

In: Crystal Growth and Design, Vol. 8, No. 5, 01.05.2008, p. 1559-1565.

Research output: Contribution to journalArticle

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T2 - A neutron scattering study of aqueous urea

AU - Burton, R. C.

AU - Ferrari, E. S.

AU - Davey, R. J.

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AU - Bowron, D. T.

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