Statistical-limit line broadening in the S2 state of phenanthrene in supersonic jets

Aviv Amirav; Mark Sonnenschein; Joshua Jortner

doi:10.1021/j150667a027

Statistical-limit line broadening in the S₂ state of phenanthrene in supersonic jets

Aviv Amirav, Mark Sonnenschein, Joshua Jortner^*

^*Corresponding author for this work

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper we report on the absorption and fluorescence excitation spectra for the S₀ → S₁ and S₀ → S₂ transitions of phenanthrene in pulsed planar supersonic expansions. The line profile of the electronic origin of S₀ → S₂ transition is Lorentzian with a homogeneous width of 11 cm^-1 for electronic relaxation in the isolated molecule. The S₀ → S₂ origin of the isolated molecule, which corresponds to the statistical limit, drastically differs from the same transition of phenanthrene in durene which reveals the features of the intermediate-level structure. The dramatic medium effect on the interstate S₂-S₁ coupling is attributed to the modification of the electronic energy gap.

Original language	English
Pages (from-to)	5593-5596
Number of pages	4
Journal	Journal of Physical Chemistry
Volume	88
Issue number	23
DOIs	https://doi.org/10.1021/j150667a027
State	Published - 1984

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title = "Statistical-limit line broadening in the S2 state of phenanthrene in supersonic jets",

abstract = "In this paper we report on the absorption and fluorescence excitation spectra for the S0 → S1 and S0 → S2 transitions of phenanthrene in pulsed planar supersonic expansions. The line profile of the electronic origin of S0 → S2 transition is Lorentzian with a homogeneous width of 11 cm-1 for electronic relaxation in the isolated molecule. The S0 → S2 origin of the isolated molecule, which corresponds to the statistical limit, drastically differs from the same transition of phenanthrene in durene which reveals the features of the intermediate-level structure. The dramatic medium effect on the interstate S2-S1 coupling is attributed to the modification of the electronic energy gap.",

author = "Aviv Amirav and Mark Sonnenschein and Joshua Jortner",

year = "1984",

doi = "10.1021/j150667a027",

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AU - Amirav, Aviv

AU - Sonnenschein, Mark

AU - Jortner, Joshua

PY - 1984

Y1 - 1984

N2 - In this paper we report on the absorption and fluorescence excitation spectra for the S0 → S1 and S0 → S2 transitions of phenanthrene in pulsed planar supersonic expansions. The line profile of the electronic origin of S0 → S2 transition is Lorentzian with a homogeneous width of 11 cm-1 for electronic relaxation in the isolated molecule. The S0 → S2 origin of the isolated molecule, which corresponds to the statistical limit, drastically differs from the same transition of phenanthrene in durene which reveals the features of the intermediate-level structure. The dramatic medium effect on the interstate S2-S1 coupling is attributed to the modification of the electronic energy gap.

AB - In this paper we report on the absorption and fluorescence excitation spectra for the S0 → S1 and S0 → S2 transitions of phenanthrene in pulsed planar supersonic expansions. The line profile of the electronic origin of S0 → S2 transition is Lorentzian with a homogeneous width of 11 cm-1 for electronic relaxation in the isolated molecule. The S0 → S2 origin of the isolated molecule, which corresponds to the statistical limit, drastically differs from the same transition of phenanthrene in durene which reveals the features of the intermediate-level structure. The dramatic medium effect on the interstate S2-S1 coupling is attributed to the modification of the electronic energy gap.

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Statistical-limit line broadening in the S₂ state of phenanthrene in supersonic jets

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