Ligand-field analysis of an Er(III) complex with a heptadentate tripodal N4O3 ligand

Flanagan, B. M., Bernhardt, P. V., Krausz, E. R., Luthi, S. R. and Riley, M. J. (2001) Ligand-field analysis of an Er(III) complex with a heptadentate tripodal N4O3 ligand. Inorganic Chemistry, 40 21: 5401-5407. doi:10.1021/ic0103244

Author Flanagan, B. M.
Bernhardt, P. V.
Krausz, E. R.
Luthi, S. R.
Riley, M. J.
Title Ligand-field analysis of an Er(III) complex with a heptadentate tripodal N4O3 ligand
Journal name Inorganic Chemistry   Check publisher's open access policy
ISSN 0020-1669
Publication date 2001-01-01
Year available 2001
Sub-type Article (original research)
DOI 10.1021/ic0103244
Open Access Status Not yet assessed
Volume 40
Issue 21
Start page 5401
End page 5407
Total pages 7
Place of publication Washington DC
Publisher American Chemical Society
Language eng
Subject C1
250104 Chemical Spectroscopy
780103 Chemical sciences
Abstract Polarized absorption and emission spectra of trigonal single crystals of an Er(III) complex coordinated to a heptadentate tripodal ligand are reported at temperatures between 8 and 298 K. The assigned energy levels below the onset of ligand absorption (< 25 000 cm(-1)) are fitted to a parametrized electronic Hamiltonian. The C-3 site symmetry of the Er(HI) ion requires eight parameters for a full description of the ligand field within a one-electron operator description. This compound shows unusually large splittings of the multiplets, and the fitted parameters imply that this heptadentate ligand imparts the largest ligand field reported for an Er(III) complex. The ligand field was also interpreted within the angular overlap model (AOM). We derive the AOM matrix to include both sigma and anisotropic pi bonding and show that a useful description of the C-3 ligand field can be made using only five parameters. The success of the AOM description is encouraging for applications on isomorphous complexes within the lanthanide series and in describing the ligand field of low-symmetry complexes with less parameters than in the usual spherical harmonic expansion.
Keyword Chemistry, Inorganic & Nuclear
Angular Overlap Model
Structural Characterization
Q-Index Code C1
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemistry and Molecular Biosciences
Centre for Nutrition and Food Sciences Publications
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Created: Wed, 15 Aug 2007, 01:24:35 EST