Ligação e troca iônica em interfaces zwitteriônicas / Ion Binding and Exchange in zwitterionic interfaces
AUTOR(ES)
Mauricio da Silva Baptista
FONTE
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia
DATA DE PUBLICAÇÃO
10/07/1992
RESUMO
The effect of ionic domains of formally neutral zwitterionic interfaces, represented by micelles and vesicles obtained with dipolar headgroups amphiphiles, on the binding and exchange of ionic species were investigated. The systems studied included: aqueous micelles of 1-(N-hexadecyl-N,N-dimethylammonio) Propane Sulfonate (HPS), Hexadecyl Phosphoryl Choline (C16PN), and 1-hexadecylglycerophostidyl Choline (lisoPC) and vesicles of Phosphatidylcholine (PC). Binding and ion-exchange processes were assessed from the effect of these agreggates on prototropic reactions of probes such as 8-hydroxy-1,3,6-pyrenetrisulfonate pyranine). Binding of pyranine increased in the following order lisoPC
ASSUNTO(S)
vesicles vesiculas adsorção adsorption bicamadas bilayers físico-química orgânica interfacial dipole micelas micelles dipolo interfacial organic physico-chemical
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