The adsorption of amino acids at the mercury-water interphase Part I. Glycine in acid, neutral and base solutions
1973; Elsevier BV; Volume: 41; Issue: 2 Linguagem: Inglês
10.1016/s0022-0728(73)80445-0
ISSN2590-2954
Autores Tópico(s)Spectroscopy and Quantum Chemical Studies
ResumoThe adsorption of glycine on mercury from acid, neutral and alkaline solutions has been studied by electrocapillary and capacity methods. In neutral solutions there is a minimum in the adsorption as would be expected for a highly polar adsorbate. However, the high dipole moment of glycine is not apparent in the form of a potential shift at constant electrode charge. Hence, it is suggested that the molecule is adsorbed with the dipole essentially parallel to the electrode surface. Glycinate and glycinium ions behave as typical anions and cations, respectively. There is some evidence that the former adsorption is more closely congruent in potential than in charge.
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