Selective adsorption of methyl esters on n-fatty acids at the silica/benzene and silica/carbon tetrachloride interface. Part 3.—Infrared studies and the structure of the solid surface
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 71, 2398-2404
- https://doi.org/10.1039/f19757102398
Abstract
A cell for studying the infrared absorption spectrum of species adsorbed at the solid/liquid interface is described. It has been used to study the spectra of a series of methyl esters of n-fatty acids at the silica/C6H6 and silica/CCl4 interfaces. The results show that independent of whether the solid surface carries only isolated surface silanol groups or these and H-bonded silanol groups it is only the former species which act as adsorption centres. From each solvent the adsorbed molecules are held by H-bonding between the ester's carbonyl group and the surface silanol group. The absorption band of the perturbed surface silanol group is at 3450 cm–1, suggesting that the H-bonding is of a localised form and does not include a contribution from solvent molecules.Keywords
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