Molecular structure-interfacial activity relationship ofN-substituted amino acids

The adsorption of the nonanoic acid at the electrified Hghqueous solution interface is studied by means of capacity and surface tension measurements. Comparison of the experimental r,,, value with the calculated more favoured solvated conformation suggests that the acid is adsorbed in a partially coiled conformation. The adsorption free energy here determined, together with previously reported values found in the literature concerning other saturated acids and alcohols, is compared with reactivity and calculated molecular descriptors. The collected evidence suggests that the hydrophobic nature of the acid is responsible for the adsorption, while the electric field/molecule interaction, occurring at the electrified interface, governs the desorption. Lastly, some experimental (capacitive transients, effect of the temperature on the tensammetric curves) and theoretical findings are discussed which indicate that the adsorbed acid monolayer should be regarded as a usual, in the field of adsorption at electrodes, disordered network. Thus excluding the occurrence of a two-dimensional phase transition involving the formation of a 2 D solid-like film.

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On the Nature of the Nonanoic Acid Monolayer Adsorbed at the Hg/Aqueous Solution Interface: Influence of Conformational Freedom in Bulk Aqueous Solution

Bordi

Carlà

Passamonti

et al. 1995

Ber Bunsenges Phys Chem

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Phase transition in the adsorption process of N-dansylglycinate anion on mercury

Benedetti¹,

Borsari²,

Gavioli³

et al. 1990

Journal of Electroanalytical Chemistry and Interfacial Electroc

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On the influence of molecular structure on the orientation and the occurrence of phase transitions in organic adsorbed layers at the mercury—water interface

Buess‐Herman

Franck

Gierst

1992

Journal of Electroanalytical Chemistry

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Molecular structure-interfacial activity relationship ofN-substituted amino acids

Cited by 4 publications

References 49 publications

On the Nature of the Nonanoic Acid Monolayer Adsorbed at the Hg/Aqueous Solution Interface: Influence of Conformational Freedom in Bulk Aqueous Solution

On the Nature of the Nonanoic Acid Monolayer Adsorbed at the Hg/Aqueous Solution Interface: Influence of Conformational Freedom in Bulk Aqueous Solution

Phase transition in the adsorption process of N-dansylglycinate anion on mercury

On the influence of molecular structure on the orientation and the occurrence of phase transitions in organic adsorbed layers at the mercury—water interface

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