THE VIBRATIONAL SPECTRA OF MOLECULAR IONS ISOLATED IN SOLID NEON. I. $CO^{+}_{2}$ AND $CO_{2}^{-}{^{\ast}}$
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Date
1989
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Ohio State University
Abstract
When a Ne:$CO_{2}$ sample is codeposited with a beam of neon atoms excited in a microwave discharge, both $CO^{+}_{2}$ and $CO^{-}_{2}$ are stabilized in sufficient concentration for the detection of their antisymmetric stretching absorption, $\nu_{3}$. The position of the absorption for $CO_{2}^{+}$ is in excellent agreement with that recently reported for the gas-phase ion. The positions of the corresponding abaorptions of the carbon-13 and oxygen-18 substituted species, reported for the first time, support the assignment. The $\nu_{3}$ absorption of $CO_{2}^{-}$ is significantly shifted from the position previously reported for this fundamental of the $M^{+}CO_{2}^{-}$ species $(M = Li, Na, K, Cs)$ isolated in an argon matrix. Photodetachment of $CO_{2}^{-}$ occurs when the sample is exposed to radiation in the visible spectral region. Evidence will be presented for the stabilization of the $CO_{2}\cdots CO_{2}^{-}$ cluster ion in the present experiments.
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$^{\ast}$ Work supported in part by the U. S. Army Research Office under Proposal No. 25664-CH.
Author Institution: Molecular Spectroscopy Division, National Institute of Standards and Technology; National Science Foundation, Guest Worker at the National Institute of Standards and Technology
Author Institution: Molecular Spectroscopy Division, National Institute of Standards and Technology; National Science Foundation, Guest Worker at the National Institute of Standards and Technology