Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 8, Issue 2, Pages 279-284Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b509279e
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Funding
- Engineering and Physical Sciences Research Council [EP/D506158/1] Funding Source: researchfish
- EPSRC [EP/D506158/1] Funding Source: UKRI
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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 N-2 layers of different thickness. RAIR spectra have been taken after CO had been adsorbed on a bare gold substrate and on pre-adsorbed solid N-2 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 N-2 layer. Here we present the experimental results and show that these can be predicted by the elementary electromagnetic theory.
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