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

Paul, Alison ORCID: https://orcid.org/0000-0002-7653-9964, Fallis, Ian Andrew ORCID: https://orcid.org/0000-0001-7361-0182, Cooper, Catherine, Wess, Timothy James, Thomas, Kate, Heenan, Richard, King, Stephen and Griffiths, Peter Charles 2010. 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. Soft Matter 6 (11) , pp. 2552-2556. 10.1039/b926812j

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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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Optometry and Vision Sciences
Subjects:	Q Science > Q Science (General)
Publisher:	RSC
ISSN:	1744-683X
Last Modified:	02 Dec 2022 12:11
URI:	https://orca.cardiff.ac.uk/id/eprint/9740

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