In-Depth XANES and EXAFS Characterization of the Ag<sup>+</sup> Ion Coordination in Dimethyl Sulfoxide Solution
X-ray absorption near-edge structure (XANES) spectroscopy has been used, in conjunction with extended X-ray absorption fine structure (EXAFS), to determine the coordination structure of the Ag<sup>+</sup> ion in a dimethyl sulfoxide (DMSO) solution. From the EXAFS data analysis, the Ag-O first shell distance in DMSO was found to be 2.31(3) Å, with 4.1(5) oxygen atoms surrounding the Ag<sup>+</sup> ion, in fair agreement with previous results. This technique did not allow us to determine the geometry of the 4-fold coordination complex and a quantitative analysis of the XANES region was carried out to shed light on this issue. The XANES data analysis confirmed the presence of a four-coordinated complex, unambiguously showing that a regular tetrahedral [Ag(DMSO)<sub>4</sub>]<sup>+</sup> complex is formed when silver triflate is dissolved in DMSO solution.
Authors
- P. D’Angelo (ORCID: https://orcid.org/0000-0001-5015-8410)
- Andrea Melchior (ORCID: https://orcid.org/0000-0002-5265-1396)
- Alessandro Tofoni (ORCID: https://orcid.org/0000-0003-1935-4063)
- Andrea Colella (ORCID: https://orcid.org/0000-0002-6060-5584)
- Matteo Busato (ORCID: https://orcid.org/0000-0002-9450-0481)
Institutions
- University of Udine (IT)
- Sapienza University of Rome (IT)
Publication Details
- Journal
- The Journal of Physical Chemistry B
- Published
- 2024-08-12
- DOI
- https://doi.org/10.1021/acs.jpcb.4c04001
- Citations
- 1
- Primary Topic
- X-ray Spectroscopy and Fluorescence Analysis
- Type
- article
- Field-Weighted Citation Impact
- 0.61
Funders
- Ministero dell’Istruzione, dell’Università e della Ricerca