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 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.
Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States.
Kylie A
KA
Kufeld
Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States.
William R
WR
Wonderly
Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States.
Leif O
LO
Paulson
Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States.
Sharon C
SC
Kettwich
Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States.
David T
DT
Anderson
H-atom; H···H2O van der Waals complex; infrared; matrix isolation; quantum tunneling