X-ray photoelectron spectroscopy study of a cyclic hexanuclear cluster

Autor(en): Chiuzbaian, SG
Neumann, M
Waldmann, O
Schneider, B
Bernt, I
Saalfrank, RW
Stichwörter: Chemistry; Chemistry, Physical; clusters; ELECTRONIC-STRUCTURE; iron oxide; Physics; Physics, Condensed Matter; polycrystalline surfaces; SPECTRA; TRANSITION-METAL COMPOUNDS; X-ray photoelectron spectroscopy
Erscheinungsdatum: 2001
Herausgeber: ELSEVIER SCIENCE BV
Journal: SURFACE SCIENCE
Volumen: 482
Ausgabe: 2
Startseite: 1272
Seitenende: 1276
Zusammenfassung: 
We report on a study of a ferric-wheel system by X-ray photoelectron spectroscopy. The sample investigated was a cyclic hexanuclear Fe(III) cluster entrapping an alkaline ion: [Li subset of Fe6L6]Cl, L=N(CH2CH2O)(3). The Fe3s and 2p photoelectron spectra recorded for the ferric wheel and other Fe compounds, where Fe hits the formal valence state 3+ or 2+, were compared. Uncommonly spectral features of the 3s line were qualitatively explained. It seems that unlike the usual transition metal compounds the electron energy configuration in the cluster favors the population of a final state with high-spin arrangement of electrons and a ligand hole. This could be due to covalency in such molecular compounds. (C) 2001 Elsevier Science B.V. All rights reserved.
Beschreibung: 
19th European Conference on Surface Science (ECOSS-19), MADRID, SPAIN, SEP 05-08, 2000
ISSN: 00396028
DOI: 10.1016/S0039-6028(01)00928-1

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