ROTATIONAL SPECTROSCOPY OF CARBON MONOXIDE SOLVATED WITH PARA-HYDROGEN MOLECULES
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Date
2009
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Ohio State University
Abstract
Rotational spectra of carbon monoxide ($^{12}$C$^{16}$O and $^{13}$C$^{16}$O) solvated with \textit{N}=2 to 7 para-hydrogen (pH$_2$) molecules were studied by high resolution Fourier transform microwave spectroscopy. Infrared spectra of (pH$_2$)$_\textit{N}$-CO clusters have previously been reported by Moroni \textit{et al.}Moroni, M. Botti, S.{\nobreakspace}De Palo, A. R. W. McKellar, \textit{J. Chem. Phys.}, \textbf{122}, 094314 (2005).}. It is expected that the end-over-end rotational frequency decreases from \textit{N}=2 to \textit{N}=6, then increases with the addition of the next several helium atoms; this could indicate a significant decoupling of pH$_2$ density from CO rotation. By measuring the microwave transitions of these clusters we are able to separate the rotational and vibrational contributions to the rovibrational line positions. The trend of the pure rotational frequencies with increasing \textit{N}-value will be presented.
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S.{\nobreakspace
Author Institution: \textit{Department of Chemistry, University of Alberta, Edmonton, Alberta T6G-2G2, Canada}
Author Institution: \textit{Department of Chemistry, University of Alberta, Edmonton, Alberta T6G-2G2, Canada}