Abstract
Functionalized double-chain surfactant 1 (potassium O,O‘-didodecylphosphorodithioate) was synthesized. Its small unilamellar vesicles were characterized by dynamic laser light scattering and differential scanning calorimetry and its giant vesicles by phase-contrast optical microscopy. Also, 1's giant vesicles containing fluorescent dye 4a (5-carboxyfluorescein) or 4b [5-(dodecanamido)fluorescein] were characterized by epifluorescence microscopy. In a pH 9.0 borate buffer at 25 °C, vesicular 1 reacted with 2 (2-chloroethyl phenyl sulfide), a simulant for the chemical warfare agent mustard [bis(2-chloroethyl) sulfide], to give 5 [S-[(2-phenylthio)ethyl] O,O‘-didodecylphosphorodithioate], involving capture of reactive intermediate cation 9 (1-phenylthiocyclopropane) by the anion of 1. This reaction was accompanied by the precipitation of 5, which resulted in wounding/destruction of the vesicles and the release of dye 4a (from giant vesicles). The combination of the conversion of 2 into 5 and dye release sugg...
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