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Aromaticity, electronic structure and molecular dimension in the adsorption of organic compounds on mercury—II. Intermolecular interactions among adsorbed molecules

✍ Scribed by C. Fontanesi; L. Benedetti

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 657 KB
Volume: 42
Category: Article
ISSN: 0013-4686
DOI: 10.1016/s0013-4686(96)00358-1

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✦ Synopsis

The Frumkin interaction parameter between aromatic molecules (neutral form) adsorbed from aqueous solution on mercury electrode, is related to the balance of energy dispersion terms (adsorbate-adsorbate)

and water-water molecular interaction reflecting the role played by substitution on the electrode surface of water by the aromatic molecule. The interaction among adsorbed aromatics (in neutral form) is always attractive, so that the sign of @ (Frumkin parameter, positive or negative) arises from that kind of balance. For aromatic anions, taking into account a large partial charge transfer from the adsorbate to the metal surface, the change of AGXDs at varying the coverage (0) is mainly due to electrostatic repulsion among charge adsorbed particles. <c:

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✍ L. Benedetti; C. Fontanesi 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 748 KB

AI&met-The adsorbability of a wide series of aromatic derivatives (38) on mercury from aqueous solution at constant potential (E or close to it) cannot be simply accounted for by the " aromaticity \* of the compounds, at any rate rnoa%Iated by substituent groups on the aromatic moiety, even if the a