Premium
Coherent Raman spectroscopy of glyoxal vapour
Author(s) -
Duval A. B.,
King D. A.,
Haines R.,
Isenor N. R.,
Orr B. J.
Publication year - 1986
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250170204
Subject(s) - raman spectroscopy , glyoxal , rotational–vibrational spectroscopy , chemistry , coherent anti stokes raman spectroscopy , spectroscopy , analytical chemistry (journal) , overtone , wavelength , resonance (particle physics) , spectral line , nuclear magnetic resonance , optics , atomic physics , raman scattering , physics , molecule , organic chemistry , quantum mechanics , astronomy
The coherent Raman spectroscopic techniques CARS and PARS have been used to study glyoxal (C 2 H 2 O 2 ) in the vapour phase. The following fundamental vibrational frequencies for trans ‐glyoxal have been determined: ν 1 = 2840 ± 2, ν 2 = 1742.5 ± 0.5 and ν 3 = 1353.5 ± 0.5 cm −1 . Several hot and combination bands have also been identified. The rovibrational contour of the ν 2 band is unexpectedly broad and structured and a variety of possible sources of this apparent anomaly are investigated. Novel experimental strategies include simultaneous recording of CARS and PARS spectra, major variations of pump and Stokes wavelengths to eliminate resonantly enhanced processes and rotationally resolved Raman–optical double resonance spectroscopy.