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Author: search.filters.author.Rochester, Colin H.Subject: search.filters.subject.Infrared spectroscopy

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    Infrared Study of the Adsorption of Water on to the Surface of Rutile
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1977, 73 (10), 1977) Griffiths, David M; Rochester, Colin H.
    Infrared spectra of the surface of three samples of rutile which had been (a) calcined in air at 723 K and heated in oxygen at 673 K, (b) calcined in air at 973 K and heated in oxygen at 673 K, and (c) calcined in air at 723 K and heated in hydrogen at 673 K have been recorded as a function of the extent of hydroxylation and hydration of the oxide surface. The adsorption and desorption characteristics of associatively adsorbed and chemisorbed water on rutile have been established in detail and are discussed primarily in terms of adsorptive interactions involving the {110}, {100} and {101} surface planes. Calcination of rutile at high temperature (973 K) enhanced the chemisorption of water on {110} planes at the expense of the associative adsorption of water on Ti4+ ion sites in the {100} and {101} planes. Mild reduction of rutile in hydrogen decreased the ability of the oxide to adsorb water molecularly. The effect of reduction was completely reversed by subsequent heat treatment of the oxide in oxygen.
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    Infrared study of adsorption on silica from two-component and three-component liquid mixtures
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1978, 74 (09-12), 1978) Buckland, Anthony D.; Rochester, Colin H.; Trebilco, Deborah-Anne; Wigfield, Kenneth
    An infrared cell of novel design is described and has been used for the measurement of spectra of discs of powdered silica immersed in liquid mixtures of 2,2,4-trimethylpentane + cyclohexanone, 1,4-dimethylbenzene + cyclohexanone and 2,2,4-trimethylpentane + 1,4-dimethylbenzene + cyclohexanone. The proportions of surface silanol groups perturbed by interaction with each component of the liquid mixtures were evaluated from absorbance data taken from the spectra. With certain provisos, infrared spectroscopy provides a valuable method for the study of adsorption behaviour at the interface between solids and multi-component liquid mixtures.