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Issue 2, 2006
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The profile of the 2140 cm−1 solid CO band on different substrates

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Abstract

We have studied the profile of the 2140 cm−1 fundamental band of solid carbon monoxide (CO) at low temperature (10–15 K) by infrared transmission spectroscopy and by reflection absorption infrared (RAIR) spectroscopy. In particular, transmission spectra have been taken after CO had been adsorbed on a bare crystalline silicon substrate and on pre-adsorbed solid N2 layers of different thickness. RAIR spectra have been taken after CO had been adsorbed on a bare gold substrate and on pre-adsorbed solid N2 layers of different thickness. Laboratory spectra show that the profile of the fundamental CO band at about 2140 cm−1 is different in the different instances considered. In particular, we have found that the relative intensity of the LO and TO modes of the CO band depends on the thickness of the N2 layer. Here we present the experimental results and show that these can be predicted by the elementary electromagnetic theory.

Graphical abstract: The profile of the 2140 cm−1 solid CO band on different substrates

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Article information


Submitted
01 Jul 2005
Accepted
05 Oct 2005
First published
20 Oct 2005

Phys. Chem. Chem. Phys., 2006,8, 279-284
Article type
Paper

The profile of the 2140 cm−1 solid CO band on different substrates

M. Elisabetta Palumbo, G. A. Baratta, M. P. Collings and M. R. S. McCoustra, Phys. Chem. Chem. Phys., 2006, 8, 279
DOI: 10.1039/B509279E

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