Photodissociation spectra of transition metal sulfides: Spin-orbit structure in charge transfer bands of FeS+ and NiS+

John Husband, Fernando Aguirre, Christopher J. Thompson, Ricardo B. Metz

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Abstract

Photofragment spectra of FeS+ and NiS+ are reported. Analysis of the FeS+ spectrum reveals it to arise from a 6Π←6Σ charge-transfer transition, and gives the vibrational frequency, ωe =295cm-1, and spin-orbit constant, |A|=125cm-1, in the 6Π state. The onset of the NiS+ spectrum appears to occur in the middle of a vibrational progression, thus giving a precise measurement of the Ni+-S bond strength, D0(Ni+-S)=238±4kJmol-1. Analysis of the spectrum for vibrational and spin-orbit structure leads to a tentative assignment of a 4Δ ground state and suggests the spectrum is composed of overlapping transitions to two near-degenerate excited electronic states, most likely a 4Π and 4Φ pair.

Original languageEnglish
Pages (from-to)75-84
Number of pages10
JournalChemical Physics Letters
Volume342
Issue number1-2
DOIs
Publication statusPublished - Jul 6 2001

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

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