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Probing outer-sphere adsorption of aqueous metal complexes at the oxide-water interface with resonant anomalous x-ray
Changyong Park1, Paul A Fenter, Neil C Sturchio
1Environmental Research Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Physical Review Letters
|March 24, 2005
Abstract:
Resonant anomalous x-ray reflectivity near the Pt L(III) edge simultaneously revealed the geometric and spectroscopic structures of Pt(NH(3))(4)(2+) ions adsorbed at the quartz(100)-water interface. The derived Pt geometric subprofile shows two discrete "outer-sphere" adsorbed layers, and the interface-specific x-ray absorption edge profile exhibits a significant white-line enhancement compared to the bulk-solution species.
