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Issue 11, 2010
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A contrast variation small-angle scattering study of the microstructure of 2,5-dimethyl-7-hydroxy-2,5-diazaheptadecane–toluene–butanol oil-in-water metallomicroemulsions

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Abstract

Metallosurfactants comprising copper(II) (Cu(NO3)2) and zinc(II) (Zn(NO3)2) nitrate complexes of 2,5-dimethyl-7-hydroxy-2,5-diazaheptadecane were found to form stable oil-in-water microemulsions—metallomicroemulsions—that could solubilise toluene in the presence of butanol. A detailed contrast-variation scattering analysis, employing both neutrons and X-rays, in conjunction with pulsed-gradient spin-echo NMR and simple phase diagram construction, demonstrated that the system formed is that of a conventional microemulsion—a core comprising toluene, separated from the aqueous phase by the surfactant and co-surfactant/co-solvent. This study further demonstrates the versatility of metallosurfactants and the similarity of their physical chemistry behaviour to that of conventional surfactants.

Graphical abstract: A contrast variation small-angle scattering study of the microstructure of 2,5-dimethyl-7-hydroxy-2,5-diazaheptadecane–toluene–butanol oil-in-water metallomicroemulsions

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Supplementary files

Article information


Submitted
22 Dec 2009
Accepted
06 Apr 2010
First published
30 Apr 2010

Soft Matter, 2010,6, 2552-2556
Article type
Paper

A contrast variation small-angle scattering study of the microstructure of 2,5-dimethyl-7-hydroxy-2,5-diazaheptadecane–toluene–butanol oil-in-water metallomicroemulsions

A. Paul, I. Fallis, C. Cooper, T. Wess, K. Thomas, R. Heenan, S. King and P. Griffiths, Soft Matter, 2010, 6, 2552
DOI: 10.1039/B926812J

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