Laser-induced fluorescence and Optical/Stark spectroscopy of PtC

S. A. Beaton, Timothy Steimle

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Optical/Stark measurements have been performed on the (0,0) bands of both the A″ 1Σ+ -X 1Σ+ system (v0 ≈ 12643 cm-1) and the A′ 1 Π- XΣ+ system (v0 ≈ 13 196 cm-1) of platinum monocarbide. The PtC molecules were produced in a pulsed supersonic molecular beam source following the reaction of laser ablated platinum vapor with a mixture of a few percent of methane in argon. The newly determined permanent electric dipole moments obtained are 1.94(2)D (A″ 1Σ+) and 1.919(9)D (A′ 1Π). These results are discussed in terms of a proposed molecular orbital correlation diagram for platinum containing diatomics. The laser-induced fluorescence spectrum of the (0,0)A″ 1Σ+ - X 1Σ+ transition of PtC has been re-recorded at high resolution (full width of half-maximum ∼40 MHz) and analyzed to yield rotational constants for the four most abundant isotopomers of PtC, extending the previous analysis [Appelblad, Nilsson, and Scullman, Phys. Scr. 7, 65 (1973)]. The anomalously large value (∼15 MHz) for the newly derived nuclear-spin rotation parameter, C1(195Pt), for the A″ 1Σ+ state is discussed.

Original languageEnglish (US)
Pages (from-to)10876-10882
Number of pages7
JournalJournal of Chemical Physics
Volume111
Issue number24
DOIs
StatePublished - Dec 22 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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