X-ray absorption study of gold coordination compounds: EXAFS refinements and double-electron excitation background

Benfield, R. E.; Filipponi, A.; Bowron, D. T.; Newport, R. J.; Gurman, S. J.

doi:10.1088/0953-8984/6/41/007

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X-ray absorption spectra at the Au L edges of Au(PPh3)Cl, Au(PPh3)2Cl and KAuCl4.2H2O have been collected as a function of temperature. Data analysis of the extended X-ray absorption fine structure was carried out with the GNXAS package performing an appropriate treatment of the multiple-scattering effects involving several ligand atoms. The accuracy of the current analysis procedures for the Au L edges is assessed and the sensitivity to coordination numbers and distances is established. Evidence for the presence of a (2p4f) double-electron excitation in the atomic Au background is obtained for the first time. The results presented in this paper are of general importance for improving data analysis at the Au L edges and in particular for improving the EXAFS results in Au cluster compounds.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11697/14582

Titolo:	X-ray absorption study of gold coordination compounds: EXAFS refinements and double-electron excitation background
Autori interni:	FILIPPONI, Adriano
Data di pubblicazione:	1994
Rivista:	JOURNAL OF PHYSICS. CONDENSED MATTER
Abstract:	X-ray absorption spectra at the Au L edges of Au(PPh3)Cl, Au(PPh3)2Cl and KAuCl4.2H2O have been collected as a function of temperature. Data analysis of the extended X-ray absorption fine structure was carried out with the GNXAS package performing an appropriate treatment of the multiple-scattering effects involving several ligand atoms. The accuracy of the current analysis procedures for the Au L edges is assessed and the sensitivity to coordination numbers and distances is established. Evidence for the presence of a (2p4f) double-electron excitation in the atomic Au background is obtained for the first time. The results presented in this paper are of general importance for improving data analysis at the Au L edges and in particular for improving the EXAFS results in Au cluster compounds.
Handle:	http://hdl.handle.net/11697/14582
Appare nelle tipologie:	1.1 Articolo in rivista

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