The research described in this product was performed in part in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory. By preparing methyl bromide (CH3Br) in selected rotational levels of the CH3Br(X˜ 1A1; V1 = 1) state with infrared
(IR) laser excitation prior to vacuum-ultraviolet (VUV) laser pulsed field ionization-photoelectron (PFI-PE)
measurements, we have observed rotationally resolved photoionization transitions to the CH3Br?(X˜ 2E3/2; V1
+ = 1)
state, where V1 and V1
+ are the symmetric C-H stretching vibrational mode for the neutral and cation,
respectively. The VUV-PFI-PE origin band for CH3Br?(X˜ 2E3/2) has also been measured. The simulation of
these IR-VUV-PFI-PE and VUV-PFI-PE spectra have allowed the determination of the V1
+ vibrational frequency
(2901.8 ( 0.5 cm-1) and the ionization energies of the origin band (85 028.3 ( 0.5 cm-1) and the V1
+ ) 1
r V1 ) 1 band (84 957.9 ( 0.5 cm-1).
Revised: April 7, 2011 |
Published: October 2, 2008
Citation
Xing X., P. Wang, B. Reed, S. Baek, and C. Ng. 2008. "Infrared Vacuum-Ultraviolet Laser Pulsed Field Ionization-Photoelectron Study of
CH3Br?(X˜ 2E3/2)." Journal of Physical Chemistry A 112, no. 39:9277-9282. doi:10.1021/jp8019649