Infrared spectroscopic characterization of the alumina surface 1. Infraredspectra of Cr(CO)(6) adsorbed at different surface sites on gamma-alumina

Authors
Baumgarten, E Dick, P
Citation
E. Baumgarten et P. Dick, Infrared spectroscopic characterization of the alumina surface 1. Infraredspectra of Cr(CO)(6) adsorbed at different surface sites on gamma-alumina, J COLL I SC, 209(1), 1999, pp. 16-19
Citations number
22
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN journal
00219797 → ACNP
Volume
209
Issue
1
Year of publication
1999
Pages
16 - 19
Database
ISI
SICI code
0021-9797(19990101)209:1<16:ISCOTA>2.0.ZU;2-Z
Abstract
Infrared spectra of Cr(CO)(6) adsorbed at different surface centers on gamm a-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 O-h symmetry was widely con served, and addition to strong Lewis centers led to lowering of the symmetr y. The assumption of C-4 upsilon symmetry, caused by interaction of one CO group of the complex with a Lewis center, may explain the spectra. Approxim ate values for the integral extinction coefficients were determined. (C) 19 99 Academic Press.