IR-SPECTROSCOPIC STUDY OF SURFACE CARBONYL COMPLEXES OF COPPER ATOMS AND IONS
Loading...
Date
1995
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Surface carbonyl complexes of $Cu^{o} - Co, Cu^{+} - Co$ and $Cu^{2+} - Co$ have been studied by the method of IR-spectroscopy. Within the ranges of the $\sigma-\pi$ binding model the frequency of C-o stretching vibrations in the surface M-CO complexes depends directly on the effective charge of the metal ions and atoms [1]. The investigation has revealed that position and intensity of co absorption bands depend strongly on influence of ligands on electronic state of copper. The modifying ce and Zr oxides raise the intensity and multiplicity of $Cu^{\mp} - Co$ absorption bands at $2110-2140 cm^{-1}$ wave length. The action of La, Cs and Rb oxides on the copper electronic state leads to the pronounced shift of $Cu^{+}-Co$ and $Cu^{\circ}-Co$ absorption bands to low-frequency range $(2060-2100 cm^{-1})$. The observed effects are associated with the electronic donor-accepter interaction of $M^{n+}-Cu^{+}$ and $O^{\delta-}-Cu^{+}$, that causes change of copper effective charge and, accordingly, shift of co absorption bands.
Description
1. A.A. Davydov, Infrared Spectroscopy of Adsorbed Species on the Surface of Transition Metal oxides, Wiley, New York, 1990.
Author Institution: Tomsk State Academy of Civil Engineering, Solanaya sq.2, Tomsk 634003, Russia
Author Institution: Tomsk State Academy of Civil Engineering, Solanaya sq.2, Tomsk 634003, Russia