Electrochemical study of a dendritic family at the water/1,2 dichloroethane interface. Determination of partition coefficients and acid dissociation constant

M. CALDERON; L. MONZON; M. MARTINELLI; M. YUDI; M. STRUMIA

AMER CHEMICAL SOC

Año: 2008 vol. 24 p. 6343 - 6343

span lang="en" style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Times New Roman","serif"; mso-ansi-language: EN-US; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; mso-bidi-language: AR-SA">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 molecules. Voltammetric parameters were employed to evaluate the hydrophilic / hydrophobic character and to calculate the acid dissociation constant of these molecules. The results were explained taking into account the nature and multiplicity of functional surface groups.