Collect. Czech. Chem. Commun. 2011, 76, 1879-1893
Published online 2012-01-26 11:06:00

The correct interpretation of tetramethylthiourea electrosorption data in 3 M NaClO4 solution

Jolanta Nieszporek

Department of Analytical Chemistry and Instrumental Analysis, Faculty of Chemistry, Maria Curie-Sklodowska University, Pl. M. Curie Skłodowskiej 3, 20-031 Lublin, Poland


Tetramethylthiourea (TMTU) electrosorption behaviour at the mercury electrode in 3 M NaClO4 has been examined. Using a new concept of adsorption isotherm, new theoretical expressions have been proposed. The application of these equations shows evident influence of the electrode charge on the TMTU adsorption. It can be concluded that TMTU molecules are largely specifically bonded and at zero electrode charge the change of adsorbed TMTU molecules orientation is observed.

Keywords: Tetramethylthiourea; Standard free energy of adsorption; Flory–Huggins isotherm; Non-random two liquid model.

References: 25 live references.