Electrical Switching between Vesicles and Micelles via Redox-Responsive Self-Assembly of Amphiphilic Rod−Coils
2011; American Chemical Society; Volume: 133; Issue: 14 Linguagem: Inglês
10.1021/ja200297j
ISSN1943-2984
AutoresHoon Kim, Sang‐Mi Jeong, Ji‐Woong Park,
Tópico(s)Analytical Chemistry and Sensors
ResumoAn aqueous vesicular system that is switchable by electric potential without addition of any chemical redox agents into the solution is demonstrated using redox-responsive self-assembly of an amphiphilic rod-coil molecule consisting of a tetraaniline and a poly(ethylene glycol) block. The vesicle membrane is split by an oxidizing voltage into smaller pucklike micelles that can reassemble to form vesicles upon exposure to a reducing voltage. The switching mechanism is explained by the packing behavior of the tetraaniline units constituting the membrane core, which depends on their oxidation states.
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