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Issue 11, 2008
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Vibrational spectra of small silicon monoxide cluster cations measured by infrared multiple photon dissociation spectroscopy

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Abstract

The first gas-phase infrared spectra of silicon monoxide cations (SiO)n+, n = 3–5, using multiple photon dissociation in the 550–1250 cm−1 frequency range, are reported. All clusters studied here fragment via loss of a neutral SiO unit. The experimental spectra are compared to simulated linear absorption spectra from calculated low energy isomers for each cluster. This analysis indicates that a “ring” isomer is the primary contributor to the (SiO)3+ spectrum, that the (SiO)4+ spectrum results from two close-lying bicyclic ring isomers, and that the (SiO)5+ spectrum is from a bicyclic ring with a central, fourfold-coordinated Si atom. Experiment and theory indicate that the energies and energetic orderings of (SiO)n+ isomers differ from those for neutral (SiO)n clusters.

Graphical abstract: Vibrational spectra of small silicon monoxide cluster cations measured by infrared multiple photon dissociation spectroscopy

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Supplementary files

Article information


Submitted
29 Oct 2007
Accepted
02 Jan 2008
First published
30 Jan 2008

Phys. Chem. Chem. Phys., 2008,10, 1502-1506
Article type
Paper

Vibrational spectra of small silicon monoxide cluster cations measured by infrared multiple photon dissociation spectroscopy

E. Garand, D. Goebbert, G. Santambrogio, E. Janssens, P. Lievens, G. Meijer, D. M. Neumark and K. R. Asmis, Phys. Chem. Chem. Phys., 2008, 10, 1502
DOI: 10.1039/B716627C

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