RESUMO

The transfer of six dendritric molecules, DMs, across the water/1,2-dichloroethane interface was investigated using cyclic voltammetry. From the variation of peak potential with pH, two different mechanisms of transfer were postulated depending on the nature of the molecules. Voltammetric parameters were employed to evaluate the hydrophilic/hydrophobic character and calculate the acid dissociation constant of these molecules. The results were explained taking into account the nature and multiplicity of functional surface groups.

Assuntos

Dendritos/metabolismo , Eletroquímica/métodos , Dicloretos de Etileno/química , Água/química , Físico-Química/métodos , Concentração de Íons de Hidrogênio , Espectroscopia de Ressonância Magnética , Modelos Biológicos , Modelos Químicos , Nanopartículas , Nanotecnologia/métodos , Solventes/química , Espectroscopia de Infravermelho com Transformada de Fourier , Propriedades de Superfície