Collision-induced vibrational energy relaxation in 1Au glyoxal-d2

doi:10.1016/0022-2860(80)85108-8

Journal of Molecular Structure

Volume 61, 1980, Pages 101-104

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Abstract

Efficiencies for collision-induced vibrational energy transfer from the single vibronic level 7² of S₁ glyoxal-d₂, have been obtained with the noble gases as collision partners. The measurements have been performed in the one-collision limit. The dependence of these efficiencies on the reduced mass of the collision pair indicates that vibrational energy transfer is induced on the repulsive part of the intermolecular potential.

Time-resolved measurements are shown to provide a method to determine at which pressure effects due to consecutive collisions become Significant.

References (3)

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Cited by (7)

Vibrational relaxation of glyoxal in collisions with He and Ar
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Using the AVCC-1OS (azimuthal and vibrational close-coupled, infinite-order sudden) method, we have calculated efficiencies for vibrational relaxation of glyoxal in collisions with He and Ar at room temperature. For glyoxal-d₂ (deuterated glyoxal) + He the calculated efficiency P( 0°, k = 0→7¹) is in reasonable agreement with experiment, but for glyoxal-d₂ + Ar the calculated v of P(0°, k=0→7¹) is much lower than the experimental value. While part of the discrepancy may be due to the sudden approximation (to the sl nevertheless suggest that, especially for heavier collision partners, the experimental values of P(0°→7¹) should be much too high because the question of how rotational relaxation should affect the measurement of vibrationally relaxed and unrelaxed emission was not considered in the experiment. For glyoxal-d₂ + He, the calculated efficiencies P(8¹→6¹) and P(8¹→8¹7¹) agreement with experiment. Because the frequency difference between the ν₆ and the ν₈ modes is much smaller in glyoxal-h₂ (“normal” or protonated glyoxal), for glyoxal-h₂ + He the calculated efficiency P(8¹→6¹) is much higher than for glyoxal-d₂ + He.
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1987, The Journal of Chemical Physics
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1983, The Journal of Chemical Physics

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Intermolecular Energy TransferCollision-induced vibrational energy relaxation in 1Au glyoxal-d2

Abstract

J. Chem. Phys.

Intermolecular Energy Transfer
Collision-induced vibrational energy relaxation in ¹A_u glyoxal-d₂