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Electronic Structure of Silver Oxides Investigated by AgL XANES Spectroscopy

✍ Scribed by Peter Behrens; Stefanie Aßmann; Uta Bilow; Christoph Linke; Martin Jansen

Publisher
John Wiley and Sons
Year
1999
Tongue
German
Weight
141 KB
Volume
625
Category
Article
ISSN
0372-7874

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✦ Synopsis

The chemistry of binary and multinary silver oxides spans from subvalent species (with a mean oxidation number for Ag smaller than + 1) to compounds with Ag in high oxidation states as + 2 and + 3. We have investigated a range of silver oxides, including the binary compounds Ag 2 O, AgO, Ag 3 O 4 and Ag 2 O 3 as well as subvalent ternary oxides, by AgL 3 and AgL 1 XANES spectroscopy. The different valence states of silver are clearly reflected in AgL 3 and AgL 1 XANES spectra. The method thus allows the determination of average oxidation numbers. In addition, the degree of electronic interaction (localized or delocalized electronic states) in silver-oxygen compounds can be estimated on the basis of AgL 3 XANES spectra.

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