Collect. Czech. Chem. Commun. 2009, 74, 1517-1530
Published online 2009-12-14 08:45:26

Adsorption of tert-butyl alcohol at the Hg|aqueous perchlorate interface in the presence of tetramethylthiourea

Dorota Gugała-Fekner*, Zygmunt Fekner, Jolanta Nieszporek, Dorota Sieńko and Jadwiga Saba

Department of Analytical Chemistry and Instrumental Analysis, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland


The electrosorption behavior of tert-butyl alcohol at the mercury|aqueous NaClO4– tetramethylthiourea was determined by a double layer differential capacity measurement. Adsorption of tert-butyl alcohol was analyzed using the constants obtained from the modified Flory–Huggins and virial isotherm. An increase in the relative surface excess for tert- butyl alcohol with increasing NaClO4 concentration in the range from 0.1 to 1.0 M was confirmed. The observed effect may be the result of the weakest repulsive interaction between adsorbed tert-butyl alcohol molecules in 1.0 M NaClO4 with 0.05 M tetramethylthiourea.

Keywords: Differential capacity; Adsorption isotherm; Electrostatic parameters; tert-Butyl alcohol; Tetramethylthiourea; Mercury electrode; Electrosorption; Electrochemistry.

References: 23 live references.