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Oxidative Destruction of Vesicles of a Functionalized Surfactant
Ist Teil von
Langmuir, 2003-10, Vol.19 (21), p.8721-8725
Ort / Verlag
American Chemical Society
Erscheinungsjahr
2003
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Both giant and small unilamellar vesicles of functionalized surfactant 1 (potassium O,O‘-didodecylphosphorodithioate) were subjected to oxidation, which converts 1 into disulfide-linked dimer 4 [bis(O,O‘-didodecylthiophosphoryl) disulfide], with concomitant destruction of the vesicles. Sodium hypochlorite (bleach), ceric ammonium nitrate, hydrogen peroxide, and sodium hydrogenperoxymonocarbonate were used as oxidizing agents. As determined by 31P NMR, the oxidations of small unilamellar vesicles of 1 to 4 with sodium hypochlorite and ceric ammonium nitrate were complete within 5 min, and they were slower with the other two oxidizing agents. The oxidations of giant vesicles with the same reagents, which were followed in real time by phase-contrast optical microscopy, displayed the same relative rates. With sodium hypochlorite and ceric ammonium nitrate, the giant vesicles were destroyed within ca. 16 and 50 s, respectively. The results suggest that surfactant 1's vesicles have potential as storage and release devices.
Sprache
Englisch
Identifikatoren
ISSN: 0743-7463
eISSN: 1520-5827
DOI: 10.1021/la0351109
Titel-ID: cdi_crossref_primary_10_1021_la0351109
Format
–
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