Internal Rotation and Spin Conversion of CH3OH in Solid para-Hydrogen

Details Internal Rotation and Spin Conversion of CH3OH in Solid para-Hydrogen Internal Rotation and Spin Conversion of CH3OH in Solid para-Hydrogen

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sci...311..365l&link_type=abstract

Science, Volume 311, Issue 5759, pp. 365-368 (2006).

Astronomy and Astrophysics

Astrophysics

18

Scientific paper

The quantum solid para-hydrogen (p-H2) has recently proven useful in matrix isolation spectroscopy. Spectral lines of compounds embedded in this host are unusually narrow, and several species have been reported to rotate in p-H2. We found that a p-H2 matrix inhibits rotation of isolated methanol (CH3OH) but still allows internal rotation about the C-O bond, with splittings of the E/A torsional doublet in internal rotation-coupled vibrational modes that are qualitatively consistent with those for CH3OH in the gaseous phase. This simplified high-resolution spectrum further revealed the slow conversion of nuclear spin symmetry from species E to species A in the host matrix, offering potential insight into nuclear spin conversion in astrophysical sources.

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