Issue 18, 2011

Energy transfer of highly vibrationally excited phenanthrene and diphenylacetylene

Abstract

The energy transfer between Kr atoms and highly vibrationally excited, rotationally cold phenanthrene and diphenylacetylene in the triplet state was investigated using crossed-beam/time-of-flight mass spectrometer/time-sliced velocity map ion imaging techniques. Compared to the energy transfer between naphthalene and Kr, energy transfer between phenanthrene and Kr shows a larger cross-section for vibrational to translational (V → T) energy transfer, a smaller cross-section for translational to vibrational and rotational (T → VR) energy transfer, and more energy transferred from vibration to translation. These differences are further enlarged in the comparison between naphthalene and diphenylacetylene. In addition, less complex formation and significant increases in the large V → T energy transfer probabilities, termed supercollisions in diphenylacetylene and Kr collisions were observed. The differences in the energy transfer between these highly vibrationally excited molecules are attributed to the low-frequency vibrational modes, especially those vibrations with rotation-like wide-angle motions.

Graphical abstract: Energy transfer of highly vibrationally excited phenanthrene and diphenylacetylene

Article information

Article type
Paper
Submitted
08 Nov 2010
Accepted
19 Jan 2011
First published
07 Feb 2011

Phys. Chem. Chem. Phys., 2011,13, 8313-8321

Energy transfer of highly vibrationally excited phenanthrene and diphenylacetylene

H. C. Hsu, M. Tsai, Y. Dyakov and C. Ni, Phys. Chem. Chem. Phys., 2011, 13, 8313 DOI: 10.1039/C0CP02442B

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