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Adsorption of water and 18O exchange of surface hydroxyl groups on silica
Canadian Journal of Chemistry1970Vol. 48(15), pp. 2454–2456
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Abstract
Infrared spectroscopy has been used to show that the surface hydroxyl groups on highly dehydrated silica will exchange with 18 O-labeled water. The degree of exchange depends on the sample temperature and is a maximum at about 400 °C, where approximately 65% of the silanol groups contain 18 O. The use of the 18 O exchange technique for assigning surface-adsorbate stretching modes is illustrated by considering the infrared spectra of BF 3 chemisorbed on silica.
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