Role of the spacer stereochemistry on the aggregation properties of cationic gemini surfactants.
Langmuir
; 22(22): 9333-8, 2006 Oct 24.
Article
em En
| MEDLINE
| ID: mdl-17042550
ABSTRACT
The preparation and characterization of three stereoisomeric cationic gemini surfactants, 2,3-dimethoxy-1,4-bis(N-hexadecyl-N,N-dimethylammonio)butane dibromide, are described. The aggregation properties have been studied by fluorescence, electrical conductivity, and quasi-elastic light scattering. A conformational study of the surfactant headgroups has been performed by molecular mechanics calculations to investigate the effect of the stereogenic centers on the surfactant molecular shape and therefore on the different organizations of the monomers in the aggregates. Results show that the stereochemistry of the spacer strongly influences the aggregation behavior of the diasteromeric gemini in water.
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Base de dados:
MEDLINE
Assunto principal:
Tensoativos
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Cátions
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Compostos de Amônio Quaternário
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article