Journal of the Chemical Society Faraday Transactions · 1992 · 29 citations · 13 references
Natural SciencesChemistryMaterials ScienceSpectroscopic AnalysisSpectroscopySurface ScienceAbsorption SpectroscopyFree VibrationGelsInfrared SpectroscopyOptical SpectroscopyVibrational SpectroscopyFourier Transform Infrared SpectroscopyHigh-resolution Infrared SpectroscopyInfrared Absorption SpectraInfrared Absorption SpectroscopyInfrared SpectraPretreatmentSilica Gel TreatmentVibrational Absorption Bands
The fundamental free hydroxyl group vibration of silica gel has been studied using high-resolution Fourier-transform infrared photo-acoustic spectroscopy (FTIR-PAS). The position of the absorption maximum shifts according to the pretreatment temperature of the silica gel. The hydroxylic environment of the free hydroxyl group probably influences the peak position. This was modelled to estimate the relative surface coverages of the free and bridged hydroxyl groups.
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