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 language | English (US) |
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Pages (from-to) | 1006-1008 |
Number of pages | 3 |
Journal | Journal of Synchrotron Radiation |
Volume | 8 |
Issue number | 2 |
DOIs | |
State | Published - Mar 1 2001 |
Keywords
- Hydrogen bonding
- Pre-edge
- Redox potential
- S K-edge
- XAS
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Instrumentation