Resonant two-photon ionization spectroscopy of jet-cooled PtSi

Jet-cooled diatomic PtSi, produced in a laser ablation supersonic expansion source, has been spectroscopically investigated between 17 400 and 24 000 cm−1 by resonant two-photon ionization spectroscopy. Two vibrational progressions are observed and identified as the [15.7]Ω′=1←X 1Σ+ and [18.5]Ω′=1←X...

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Veröffentlicht in:The Journal of chemical physics 2000-03, Vol.112 (9), p.4118-4123
Hauptverfasser: Shao, Lian, Sickafoose, Shane M., Langenberg, Jon D., Brugh, Dale J., Morse, Michael D.
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container_issue 9
container_start_page 4118
container_title The Journal of chemical physics
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creator Shao, Lian
Sickafoose, Shane M.
Langenberg, Jon D.
Brugh, Dale J.
Morse, Michael D.
description Jet-cooled diatomic PtSi, produced in a laser ablation supersonic expansion source, has been spectroscopically investigated between 17 400 and 24 000 cm−1 by resonant two-photon ionization spectroscopy. Two vibrational progressions are observed and identified as the [15.7]Ω′=1←X 1Σ+ and [18.5]Ω′=1←X 1Σ+ band systems. Three bands in the former system and six bands in the latter system were rotationally resolved and analyzed, leading to bond lengths of re′=2.1905(13) Å and re′=2.2354(3) Å for the [15.7]Ω′=1 and [18.5]Ω′=1 states, respectively. The Ω″=0 ground state of PtSi is assigned as a 1Σ+ state, in agreement with previous work and with the assigned ground states of the isovalent NiC, PdC, PtC, and NiSi molecules. The ground state bond length of PtSi is given by r0″=2.0629(2) Å. A Rydberg–Klein–Rees analysis of the ground and excited state potential energy curves is presented, along with a discussion of the chemical bonding and a comparison to the isoelectronic molecule, AlAu. Evidence is presented for a double bond in PtSi, as opposed to a single bond in AlAu.
doi_str_mv 10.1063/1.480960
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title Resonant two-photon ionization spectroscopy of jet-cooled PtSi
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