Gas phase reactivity of size‐selected nickel cluster ions with carbon monoxide has been studied in a triple quadrupole mass spectrometer. Intensity distributions of the various nickel carbonyl ions are measured. Irradiation with a cw Ar+ laser beam demonstrates that efficient detachment of CO ligands occurs following single photon absorption by the metal cluster core. Laser‐induced photodesorption is used to counterbalance the adsorption processes, in order to control the molecular coverage of the metal cluster. Time‐resolved measurements of the kinetics of these two competing processes have been performed. A rate equation model is proposed which brings a detailed understanding of the kinetics and allows derivation of numerical values for the chemisorption rate constant and for the photoabsorption cross section.
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15 August 1988
Research Article|
August 15 1988
Laser‐induced molecular desorption from size‐selected nickel cluster carbonyl ions: Kinetics of the adsorption–desorption equilibrium
C. Brechignac;
C. Brechignac
Laboratoire Aimé Cotton, C.N.R.S., Université de Paris‐Sud, Bâtiment 505, 91405‐Orsay Cedex, France
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Ph. Brechignac;
Ph. Brechignac
Laboratoire de Photophysique Moléculaire, C.N.R.S., Université de Paris‐Sud, Bâtiment 213, 91405‐Orsay Cedex, France
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P. Fayet;
P. Fayet
Institut de Physique Expérimentale, Ecole Polytechnique Fédérale de Lausanne, PHB, Ecublens, 1015‐Lausanne, Switzerland
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W. A. Saunders;
W. A. Saunders
Institut de Physique Expérimentale, Ecole Polytechnique Fédérale de Lausanne, PHB, Ecublens, 1015‐Lausanne, Switzerland
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L. Wöste
L. Wöste
Institut de Physique Expérimentale, Ecole Polytechnique Fédérale de Lausanne, PHB, Ecublens, 1015‐Lausanne, Switzerland
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J. Chem. Phys. 89, 2419–2426 (1988)
Article history
Received:
January 06 1988
Accepted:
May 05 1988
Citation
C. Brechignac, Ph. Brechignac, P. Fayet, W. A. Saunders, L. Wöste; Laser‐induced molecular desorption from size‐selected nickel cluster carbonyl ions: Kinetics of the adsorption–desorption equilibrium. J. Chem. Phys. 15 August 1988; 89 (4): 2419–2426. https://doi.org/10.1063/1.455036
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