Abstract
The adsorption of ethyl acetate onto silica immersed in carbon tetrachloride has been studied by infrared spectroscopy. For silica which had been preheated at 863 K adsorption involved the formation of hydrogen bonds between isolated surface silanol groups and the oxygen atoms of carbonyl groups in ethyl acetate molecules. For silica preheated at 453 K the existence of other types of hydroxyl group on the oxide surface did not affect the adsorption of ethyl acetate onto isolated silanol group sites. However, a second mode of adsorption involved the formation of hydrogen bonds between pairs of adjacent hydroxyl groups and single ethyl acetate molecules. The adsorption of ethyl acetate onto pair sites constituted a stronger mode of adsorption than that involving single silanol groups and was particularly significant at low surface coverages.
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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