Abstract

Fourier transform infrared photoacoustic spectroscopy has been applied to determine the structure and orientation of pyridine and γ-Metacryloxypropyltriethoxysilane (γ-MPS) on γ-Al₂O₃ surface. Adsorption of pyridine on activated γ-Al₂O₃ leads to formation of a pyridinium ion (pyN⁺-H) and pyridine N-oxide. The orientation of pyridinium ion on the alumina surface is random, whereas the pyridine N-oxide is parallel with respect to the surface. The adsorption of oligomers of γ-MPS gives parallel layers on the alumina surface. At low γ-MPS surface coverage, the carbonyl groups interact with the surface hydroxyl groups. Increasing surface coverage leads to an excess of the free C=O species.

Recent applications of FT-IR spectroscopy to polymer systems

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Quantitative Fourier transform IR photoacoustic spectroscopy of condensed phases

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High sensitive detection of nitric oxide using laser induced photoacoustic spectroscopy at 213 nm

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