S K- and Mo L-edge X-ray absorption spectroscopy to determine metal-ligand charge distribution in molybdenum-sulfur compounds

Annette Rompel, Roehl M. Cinco, John H. Robblee, Matthew J. Latimer, Karen L. McFarlane, Jiong Huang, Marc Walters, Vittal K. Yachandra

Research output: Contribution to journalArticle

Abstract

Mo L-edge and S K-edge X-ray absorption spectroscopy were applied to investigate the charge distribution between Mo and S in a series of Mo thiolate compounds, which serve as amide-sulfur H-bonding models and exhibit different redox potentials arising from polar group effects and ligand hydrogen bonds near the redox center. For all oxidized complexes, the S K-edge spectra exhibit a thiolate-based pre-edge feature centered at 2470.2 eV and the inflection point occurs at 2472.0 eV. No intense pre-edge feature is observed in the spectra for the reduced Mo model compounds and the energy shift of the S K-edge position depends on the S-ligand. Correlations between ligand charge density and the redox potential of the Mo-S cores are observed.

Original languageEnglish (US)
Pages (from-to)1006-1008
Number of pages3
JournalJournal of Synchrotron Radiation
Volume8
Issue number2
DOIs
StatePublished - Mar 1 2001

Fingerprint

sulfur compounds
X ray absorption spectroscopy
Sulfur compounds
Charge distribution
charge distribution
Molybdenum
molybdenum
absorption spectroscopy
Ligands
ligands
Metals
metals
x rays
Charge density
Amides
Hydrogen bonds
Sulfur
inflection points
amides
Oxidation-Reduction

Keywords

  • Hydrogen bonding
  • Pre-edge
  • Redox potential
  • S K-edge
  • XAS

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Instrumentation
  • Atomic and Molecular Physics, and Optics
  • Radiation

Cite this

Rompel, A., Cinco, R. M., Robblee, J. H., Latimer, M. J., McFarlane, K. L., Huang, J., ... Yachandra, V. K. (2001). S K- and Mo L-edge X-ray absorption spectroscopy to determine metal-ligand charge distribution in molybdenum-sulfur compounds. Journal of Synchrotron Radiation, 8(2), 1006-1008. https://doi.org/10.1107/S0909049500017702

S K- and Mo L-edge X-ray absorption spectroscopy to determine metal-ligand charge distribution in molybdenum-sulfur compounds. / Rompel, Annette; Cinco, Roehl M.; Robblee, John H.; Latimer, Matthew J.; McFarlane, Karen L.; Huang, Jiong; Walters, Marc; Yachandra, Vittal K.

In: Journal of Synchrotron Radiation, Vol. 8, No. 2, 01.03.2001, p. 1006-1008.

Research output: Contribution to journalArticle

Rompel, Annette ; Cinco, Roehl M. ; Robblee, John H. ; Latimer, Matthew J. ; McFarlane, Karen L. ; Huang, Jiong ; Walters, Marc ; Yachandra, Vittal K. / S K- and Mo L-edge X-ray absorption spectroscopy to determine metal-ligand charge distribution in molybdenum-sulfur compounds. In: Journal of Synchrotron Radiation. 2001 ; Vol. 8, No. 2. pp. 1006-1008.
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