Nitroxide spin probes for magnetic resonance characterization of ordered systems


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DRAGUTAN, Ileana, Valerian DRAGUTAN, Agneta CARAGHEORGHEOPOL, Antonios K. ZARKADISC, Helmut FISCHER, Heinz HOFFMANN, 2001. Nitroxide spin probes for magnetic resonance characterization of ordered systems. In: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 183-185, pp. 767-776. ISSN 0927-7757. eISSN 1873-4359. Available under: doi: 10.1016/S0927-7757(01)00503-9

@article{Dragutan2001Nitro-22962, title={Nitroxide spin probes for magnetic resonance characterization of ordered systems}, year={2001}, doi={10.1016/S0927-7757(01)00503-9}, volume={183-185}, issn={0927-7757}, journal={Colloids and Surfaces A: Physicochemical and Engineering Aspects}, pages={767--776}, author={Dragutan, Ileana and Dragutan, Valerian and Caragheorgheopol, Agneta and Zarkadisc, Antonios K. and Fischer, Helmut and Hoffmann, Heinz} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dcterms:title>Nitroxide spin probes for magnetic resonance characterization of ordered systems</dcterms:title> <dcterms:bibliographicCitation>Colloids and Surfaces A : Physicochemical and Engineering Aspects ; (2001), 183-185. - S. 767-776</dcterms:bibliographicCitation> <dcterms:available rdf:datatype="">2013-06-05T09:11:38Z</dcterms:available> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:contributor>Dragutan, Valerian</dc:contributor> <dc:creator>Zarkadisc, Antonios K.</dc:creator> <dc:language>eng</dc:language> <bibo:uri rdf:resource=""/> <dcterms:abstract xml:lang="eng">Stable free radicals belonging to different classes have been synthesized in view of potential applications in studies of organized systems. Among them a new pyrroline nitroxide with a high fluorine content, 2,2,5,5-tetramethyl-3-pyrrolin-1-yloxy-3-[(1H,1H-perfluoro-1-octoxy)carbonyl] (3), apt to probe the hydrophobic perfluoro-rich domains inside macroaggregates, has been prepared by a rarely encountered approach namely the spin-labelling of the very cosurfactant participating in the self-assembling process. Emphasis has then been laid upon the synthesis of further stable free radicals from the group of substituted nitronyl nitroxides. A general experimental procedure has been adapted according to the nature of the 2-substituent, resulting in a series of nitronyl nitroxides with a wide range of hydrophobicity and showing spectral parameters in good agreement with literature values. Using the spin probe-electron spin resonance technique, 3 and the 1-H-imidazol-1-yloxy-4,5-dihydro-4,4,5,5-tetramethyl-2-ethyl-3-oxide (7, R=C2H5) or the 1-H-imidazol-1-yloxy-4,5-dihydro-4,4,5,5-tetramethyl-2-undecyl-3-oxide (7, R=C11H23) have been applied in ESR investigations on vesicle phases of a zwitterionic surfactant (TDMAO)/perfluorocosurfactant (PFC) system and on Triton X-100 reverse micelles, respectively. While spin probe 3 proved to be insensitive to differences between the charged and uncharged phases, probes 7 were able to detect changes in the micelle micropolarity induced by hydration. The results corroborate well with previous UV measurements in the Triton X-100 system using the same probes 7.</dcterms:abstract> <dc:creator>Caragheorgheopol, Agneta</dc:creator> <dcterms:issued>2001</dcterms:issued> <dc:date rdf:datatype="">2013-06-05T09:11:38Z</dc:date> <dc:contributor>Fischer, Helmut</dc:contributor> <dcterms:isPartOf rdf:resource=""/> <dspace:isPartOfCollection rdf:resource=""/> <dc:creator>Dragutan, Ileana</dc:creator> <dc:creator>Fischer, Helmut</dc:creator> <dc:contributor>Hoffmann, Heinz</dc:contributor> <dc:rights>terms-of-use</dc:rights> <dc:contributor>Dragutan, Ileana</dc:contributor> <dc:creator>Dragutan, Valerian</dc:creator> <dc:contributor>Caragheorgheopol, Agneta</dc:contributor> <dc:contributor>Zarkadisc, Antonios K.</dc:contributor> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:creator>Hoffmann, Heinz</dc:creator> <dcterms:rights rdf:resource=""/> </rdf:Description> </rdf:RDF>

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