“Cation transfer across a hydrogel/organic phase: Effect of cation size, hydrophobicity and acid–base properties”

ANA V. JUAREZ; LIDIA M. YUDI; CECILIA ALVAREZ IGARZABAL; MIRIAM C. STRUMIA

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2010 vol. 55 p. 2409 - 2409

p style="TEXT-ALIGN: justify; LINE-HEIGHT: normal; MARGIN: 0cm 0cm 0pt; TEXT-AUTOSPACE: ; mso-layout-grid-align: none" class="MsoNormal">The transfer of tetraethylammonium (TEA+) and protonated triflupromazine (HTFP+) through a hydrogel/ liquid interface (g/o) and a liquid/liquid interface (w/o) were compared using cyclic voltammetry. After the two phases were put in contact, the behavior of each molecule was analyzed at different Ph values and at different time points. The gel induces hydrophobic and electrostatic interactions with TEA+ and HTFP+, shifting the peak potentials to more positive values. The diffusion coefficients, D, in both phases (g and w) at different pH values were calculated. In the case of TEA+, the D value remains constant in both systems. However, the D value of HTFP+ is lower in the gel phase than in