Vibrational coupling of CO adsorbed on monodispersed Ni11 clusters supported on magnesia

Fabrice Vanolli; Ueli Heiz; Wolf Dieter Schneider

doi:10.1016/S0009-2614(97)00973-1

Vibrational coupling of CO adsorbed on monodispersed Ni₁₁ clusters supported on magnesia

Fabrice Vanolli, Ueli Heiz, Wolf Dieter Schneider

University of Lausanne

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

We present infrared and thermal desorption spectroscopic studies of CO adsorbed on size-selected nickel clusters composed of 11 atoms and supported on ultrathin magnesium oxide films. Thermal desorption spectroscopy of CO shows that on the average 4 molecules are weakly adsorbed per cluster at saturation coverage. Using an isotopic mixture of ¹²CO and ¹³CO, infrared spectroscopy reveals the existence of a vibrational coupling interaction between the 4 COs. A semi-classical model of interacting dipoles is applied to correlate the observed vibrational frequency shifts with the arrangement of the COs on the cluster. This simple analysis favors a three-dimensional structure for the deposited clusters.

Original language	English
Pages (from-to)	527-531
Number of pages	5
Journal	Chemical Physics Letters
Volume	277
Issue number	5-6
DOIs	https://doi.org/10.1016/S0009-2614(97)00973-1
State	Published - 17 Oct 1997
Externally published	Yes

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title = "Vibrational coupling of CO adsorbed on monodispersed Ni11 clusters supported on magnesia",

abstract = "We present infrared and thermal desorption spectroscopic studies of CO adsorbed on size-selected nickel clusters composed of 11 atoms and supported on ultrathin magnesium oxide films. Thermal desorption spectroscopy of CO shows that on the average 4 molecules are weakly adsorbed per cluster at saturation coverage. Using an isotopic mixture of 12CO and 13CO, infrared spectroscopy reveals the existence of a vibrational coupling interaction between the 4 COs. A semi-classical model of interacting dipoles is applied to correlate the observed vibrational frequency shifts with the arrangement of the COs on the cluster. This simple analysis favors a three-dimensional structure for the deposited clusters.",

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T1 - Vibrational coupling of CO adsorbed on monodispersed Ni11 clusters supported on magnesia

AU - Vanolli, Fabrice

AU - Heiz, Ueli

AU - Schneider, Wolf Dieter

PY - 1997/10/17

Y1 - 1997/10/17

N2 - We present infrared and thermal desorption spectroscopic studies of CO adsorbed on size-selected nickel clusters composed of 11 atoms and supported on ultrathin magnesium oxide films. Thermal desorption spectroscopy of CO shows that on the average 4 molecules are weakly adsorbed per cluster at saturation coverage. Using an isotopic mixture of 12CO and 13CO, infrared spectroscopy reveals the existence of a vibrational coupling interaction between the 4 COs. A semi-classical model of interacting dipoles is applied to correlate the observed vibrational frequency shifts with the arrangement of the COs on the cluster. This simple analysis favors a three-dimensional structure for the deposited clusters.

AB - We present infrared and thermal desorption spectroscopic studies of CO adsorbed on size-selected nickel clusters composed of 11 atoms and supported on ultrathin magnesium oxide films. Thermal desorption spectroscopy of CO shows that on the average 4 molecules are weakly adsorbed per cluster at saturation coverage. Using an isotopic mixture of 12CO and 13CO, infrared spectroscopy reveals the existence of a vibrational coupling interaction between the 4 COs. A semi-classical model of interacting dipoles is applied to correlate the observed vibrational frequency shifts with the arrangement of the COs on the cluster. This simple analysis favors a three-dimensional structure for the deposited clusters.

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U2 - 10.1016/S0009-2614(97)00973-1

DO - 10.1016/S0009-2614(97)00973-1

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VL - 277

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EP - 531

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 5-6

ER -

Vibrational coupling of CO adsorbed on monodispersed Ni₁₁ clusters supported on magnesia

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