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Direct evidence for nu1-mode excitation in the infrared multiphoton excitation of SO2

Citation:

C. Lu, J. R. Goldman, S. Deliwala, K. Hsien Chen, and E. Mazur. 1991. “Direct evidence for nu1-mode excitation in the infrared multiphoton excitation of SO2.” Chem. Phys. Lett., 176, Pp. 355–360. Publisher's Version

Abstract:

We investigated the infrared multiphoton excitation of SO2 in bulk samplesand in a supersonic jet with the 9R(22), 9R(32), and 9P(32) CO2-laser lines. Coherent anti-Stokes Raman spectra reveal unambiguously that only the nu1-mode at 1151.3 cm-1 is actually pumped; no 2nu2 overtone pumping at 1035.2 cm-1 is observed. From the spectra we directly determine the anharmonic constants chi11 = -3.65 ± 0.06 cm-1 and chi12 = -3.3 ± 0.3 cm-1.
See also: Spectroscopy of infrared multiphoton excited molecules
Last updated on 07/24/2019