Griffiths, Peter Charles, Fallis, Ian Andrew  ORCID: https://orcid.org/0000-0001-7361-0182, Willock, David James ORCID: https://orcid.org/0000-0002-8893-1090, Paul, Alison ORCID: https://orcid.org/0000-0002-7653-9964, Barrie, C. L., Griffiths, P. M., Williams, Graham Mark, King, S. M., Heenan, Richard K. and Gorgl, R.
2004.
The Structure of Metallomicelles.
Chemistry - A European Journal
10
(8)
, pp. 2022-2028.
10.1002/chem.200305670
|
Abstract
The morphology of micelles formed by two novel metallosurfactants has been studied by small-angle neutron scattering (SANS) and small-angle-X-ray scattering (SAXS). The two surfactants both contain a dodecyl chain as the hydrophobic moiety, but differ in the structure of the head group. The surfactants are CuII complexes of monopendant alcohol derivatives of a) the face-capping macrocycle 1,4,7-triazacyclanonane (tacn), and b) an analogue based upon the tetraazamacrocycle 1,4,7,10-tetraazacyclododecane. Here, neutron scattering has been used to study the overall size and shape of the surfactant micelles, in conjunction with X-ray scattering to locate the metal ions. For the 1,4,7,10-tetraazacyclododecane-based surfactant, oblate micelles are observed, which are smaller to the prolate micelles formed by the 1,4,7-triazacyclononane analogue. The X-ray scattering analysis shows that the metal ions are distributed throughout the polar head-group region, rather than at a well-defined radius; this is in good agreement with the SANS-derived dimensions of the micelle. Indeed, the same model for micelle morphology can be used to fit both the SANS and SAXS data.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Chemistry Research Institutes & Centres > Cardiff Catalysis Institute (CCI) |
| Uncontrolled Keywords: | aggregation; macrocyclic ligands; SANS; SAXS; surfactants |
| ISSN: | 09476539 |
| Last Modified: | 01 Dec 2022 10:11 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/1399 |
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