Origin of changes in the electronic transition moment of the 1A′ ← X1Σ+ system of OCS with vibrational excitation Article

cited authors

  • Joens, JA; Bair, EJ

fiu authors

abstract

  • Previous measurements of the temperature dependence of the spectral absorption coefficient of OCS are examined as an example of the Herzberg-Teller effect. The 1A′ ← 1Σ+ system can be interpreted as a forbidden transition which becomes allowed when motion in the bending coordinate Q is coupled with the electronic motions leading to a transition moment M1Q = 0.2665 D. The band strength of vibrational components of the spectrum are proportional to j + 1, where j is the bending mode quantum number. The spectrum from states excited in the bending and CS stretching modes differ from the ground state only in their relative band strengths and in spectral moments defined by red shifts consistent with Δv010 = 905 cm-1 and Δv100 = 1840 cm-1. The similarity in shape indicates that the basis for the overall outline of the spectrum is an upper state progression in the CO stretching mode which is not excited at the temperatures of the available data. © 1983 American Chemical Society.

publication date

  • January 1, 1983

Digital Object Identifier (DOI)

start page

  • 4614

end page

  • 4616

volume

  • 87

issue

  • 23