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Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/8586
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dc.contributor.authorDragutan, I.en
dc.contributor.authorDragutan, V.en
dc.contributor.authorCaragheorgheopol, A.en
dc.contributor.authorZarkadis, A. K.en
dc.contributor.authorFischer, H.en
dc.contributor.authorHoffmann, H.en
dc.date.accessioned2015-11-24T16:42:44Z-
dc.date.available2015-11-24T16:42:44Z-
dc.identifier.issn0927-7757-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/8586-
dc.rightsDefault Licence-
dc.subjectfluorinated spin probesen
dc.subjectnitronyl nitroxidesen
dc.subjectelectron spin resonanceen
dc.subjectperfluorosurfactantsen
dc.subjectped surfactantsen
dc.subjectperfluorinated polymeric surfactantsen
dc.subjectnitronyl nitroxidesen
dc.subjectnafion solutionsen
dc.subjectfree radicalsen
dc.subjectferromagnetic interactionsen
dc.subjecttriblock copolymeren
dc.subjectswollen membranesen
dc.subjectaqueous-solutionsen
dc.subjectreverse micellesen
dc.subjectphase-behavioren
dc.titleNitroxide spin probes for magnetic resonance characterization of ordered systemsen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.primaryDoi 10.1016/S0927-7757(01)00503-9-
heal.identifier.secondary<Go to ISI>://000168908700067-
heal.identifier.secondaryhttp://ac.els-cdn.com/S0927775701005039/1-s2.0-S0927775701005039-main.pdf?_tid=dde82594-356f-11e3-9574-00000aab0f27&acdnat=1381824213_576f58fa633bd048199227fcf6e06d12-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείαςel
heal.publicationDate2001-
heal.abstractStable 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 = C(2)H(5)) or the 1-H-imidazol-1-yloxy-4,5-dihydro-4,4,5,5 (7, R = C(11)H(23)) 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 W measurements in the Triton X-100 system using the same probes 7. (C) 2001 Elsevier Science B.V. All rights reserved.en
heal.publisherElsevieren
heal.journalNameColloids and Surfaces a-Physicochemical and Engineering Aspectsen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
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