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1 Polish Journal of Chemistry

1 2004

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The Adsorption and the Influence of Modified beta-Cyclodextrins on the Kinetics of Several Electrode Reactions

Trzciński D., Kośnik W., Stroka J., Temeriusz A.

Polish Journal of Chemistry

2004

Vol. 78 / nr 9

1149-1163

The adsorption of modified _-cyclodextrins (_-CD) on the mercury electrode was investigated in NaClO4 solutions using differential capacity measurements. The investigated cyclodextrins revealed stronger affinity towards mercury electrodes than native_-CD. Their behaviour was typical for a monolayer and consistent with that predicted by the Frumkin isotherm. The electrode kinetics of Cu2+/Cu(Hg) and Cd2+/Cd(Hg) couples was significantly inhibited in the presence of modified _-CD in the solutions while much faster in surfactant free solutions the electrode process of Tl+/Tl(Hg) system remained reversible also in the presence of CD's.