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Updated: Jul 23, 2026

Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments
Published on: May 11, 2017
Infrared Spectroscopic Characterization of the Alumina Surface
1Abt. f. Angew. Physikalische Chemie, Heinrich-Heine Universität, Düsseldorf, 40225, Germany
Abstract:
Infrared spectra of Cr(CO)6 adsorbed at different surface centers on gamma-alumina were investigated. The spectra of the probe complex revealed the existence of three types of strong Lewis centers and that of physisorbed Cr(CO)6. In the case of the physisorbed complex Oh symmetry was widely conserved, and addition to strong Lewis centers led to lowering of the symmetry. The assumption of C4v symmetry, caused by interaction of one CO group of the complex with a Lewis center, may explain the spectra. Approximate values for the integral extinction coefficients were determined. Copyright 1999 Academic Press.
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