Transient H2O Infrared Satellite Peaks Produced in UV Irradiated Formic Acid Doped Solid Parahydrogen

We report newly identified satellite features of the R(0) rovibrational transition of all the fundamental modes of HDO and the ν3 mode of H2O measured via FTIR spectroscopy immediately after the 193 nm in situ photolysis of formic acid (HCOOH and DCOOD) in solid parahydrogen. The intensities of thes...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2012-02, Vol.3 (3), p.342-347
Main Authors: Kufeld, Kylie A, Wonderly, William R, Paulson, Leif O, Kettwich, Sharon C, Anderson, David T
Format: Article
Language:English
Subjects:
Kinetics, Spectroscopy
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Summary:We report newly identified satellite features of the R(0) rovibrational transition of all the fundamental modes of HDO and the ν3 mode of H2O measured via FTIR spectroscopy immediately after the 193 nm in situ photolysis of formic acid (HCOOH and DCOOD) in solid parahydrogen. The intensities of these satellite features decay slowly with a time constant of τ = 121(7) min after photolysis, even when the sample is maintained below 2 K. We propose that the van der Waals complex H···H2O (H···HDO) is the carrier of the satellite peaks and that these metastable complexes are produced after the low-temperature tunneling reaction of the OH (OD) photoproduct with the parahydrogen host.
ISSN:1948-7185
1948-7185
DOI:10.1021/jz201646a