A contrast variation small-angle scattering study of the microstructure of 2,5-dimethyl-7-hydroxy-2,5-diazaheptadecane-toluene-butanol oil-in-water metallomicroemulsionsElectronic supplementary information (ESI) available: Preliminary analysis of the Zn(NO3)2-C10 system by PGSE-NMR, phase diagrams and comparative SAXS data from Diamond. See DOI: 10.1039/b926812j
Metallosurfactants comprising copper( ii ) (Cu(NO 3 ) 2 ) and zinc( ii ) (Zn(NO 3 ) 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 co...
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Sprache: | eng |
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Zusammenfassung: | Metallosurfactants comprising copper(
ii
) (Cu(NO
3
)
2
) and zinc(
ii
) (Zn(NO
3
)
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.
Small-angle neutron scattering has been used to watch the evolution of the microemulsion structure on adding toluene and butanol to the metallosurfactant solution. |
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ISSN: | 1744-683X 1744-6848 |
DOI: | 10.1039/b926812j |