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Infrared multiple-photon photodissociation of gas-phase group II metal-nitrate anions

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Abstract

Infrared spectra of gas-phase metal-nitrate anions M(NO3)(3)(-), where M = Mg2+, Ca2+, Sr2+ and Ba2+, were recorded by infrared multiple-photon dissociation (IRMPD) spectroscopy. Photodissociation of each of the precursors produces NO3- through the elimination of a neutral M(NO3)(2) unit. An absorption pattern characteristic of metal nitrates is observed in the IRMPD spectra, including the symmetric and antisymmetric NO3 stretches. The latter is split into high-and low-frequency components as a result of perturbation of the nitrate symmetry by complexation to the metal ion, and the magnitude of the splitting decreases following the trend Mg2+ > Ca2+ >Sr2+ congruent to Ba2+. The experimental spectra are in good general agreement with those obtained from density functional theory (DFT) calculations. (C) 2008 Elsevier B.V. All rights reserved.

Year of Publication
2008
Journal
International Journal of Mass Spectrometry
Volume
273
Number
1-2
Number of Pages
24-30
Date Published
Jun
Type of Article
Article
ISBN Number
1387-3806
Accession Number
ISI:000256005100005
URL
PId
4bffa1d27a5aa4ad358a0814ba6bfaa0
Alternate Journal
Int. J. Mass Spectrom.
Journal Article
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