| Magnetic self-orientation of lyotropic hexagonal phases based on long chain alkanoic (fatty) acids. | |
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MedLine Citation:
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PMID: 20329720 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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It is presently shown that long chain (C14, C16, and C18) alkanoic (saturated fatty) acids can form magnetically oriented hexagonal phases in aqueous concentrated solutions in mixtures with tetrabutylammonium (TBAOH) as the counterion. The hexagonal phase occurred for a molar ratio, alkanoic acid/TBAOH, higher than 1, i.e., for an excess of fatty acid. The hexagonal phase melted to an isotropic phase (micelles) upon heating at a given temperature depending on the alkyl chain length. The self-orientation of the hexagonal phase occurred upon cooling from the "high-temperature" isotropic phase within the magnetic field. The long axis of the hexagonal phase was shown to self-orient parallel to the magnetic field as evidenced by deuterium solid-state NMR. This finding is expected to be of interest in the field of structural biology and materials chemistry for the synthesis of oriented materials. |
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Authors:
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Jean-Paul Douliez |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Langmuir : the ACS journal of surfaces and colloids Volume: 26 ISSN: 1520-5827 ISO Abbreviation: Langmuir Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-06-30 Completed Date: 2010-09-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882736 Medline TA: Langmuir Country: United States |
Other Details:
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Languages: eng Pagination: 11397-400 Citation Subset: IM |
Affiliation:
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UR1268 Biopolymères Interactions Assemblages, INRA, équipe Interfaces et Systèmes Dispersés, F-44316 Nantes, France. jean-paul.douliez@nantes.inra.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Fatty Acids
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chemistry* Magnetic Resonance Spectroscopy Magnetics Micelles Models, Theoretical Quaternary Ammonium Compounds / chemistry Temperature X-Ray Diffraction |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids; 0/Micelles; 0/Quaternary Ammonium Compounds; 10549-76-5/tetrabutylammonium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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