Abstract
Infrared spectral data show that primary alcohols, adsorbed on porous aerated silica and heated in air, produce a carbonyl band at 1724 cm −1. The intensity of this band depends on the heating time in air. When heating is performed in the absence of air or oxygen the band is not observed. The position of this carbonyl band is compared to those obtained from secondary alcohols, aldehydes and carboxylic acids adsorbed on silica. Based on desorption measurements and band positions, it is suggested that the alcohols oxidise to carbonyl compounds and in certain cases these appear to be oligomeric products. Since alcohols adsorbed on silica can be oxidised in air, a complete understanding of the adsorption and desorption of alcohols on silica also requires that the corresponding behaviour of their oxidation products be understood.
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