Pages: 17 - 22

Authors: Yury A. TETERIN, Labud VUKCHEVICH, and Anton Yu. TETERIN

Abstract

This paper deals with the results of an X-ray photoelectron spectroscopy of lanthanide ortho-metoxybenzoates Ln(C₆H₄OCH₃COO^–)₃, where Ln represents – lanthanides La through Lu except for Pm and C₆H₄OCH₃COO^– – residuum of ortho-metoxybenzoic acid. The core and outer electron X-ray photoelectron spectroscopy spectra in the binding energy range of 0-1250 eV were shown to exhibit a complex, fine structure. The said structure was established due to the outer (0-15 eV binding energy) and inner (15-50 eV binding energy) valence molecular orbitals from the filled Ln5p and O2s atomic shells, multiplet splitting, many-body perturbation, dynamic effect, etc. The mechanisms of such a fine structure formation were shown to manifest different probabilities in the spectrum of a certain electronic shell. There fore, the fine X-ray photoelectron spectroscopy spectral structure resulting from a certain mechanism can be interpreted and its quantitative parameters related to the physical and chemical properties of the studied compounds (degree of delocalization and participation of Ln4f electrons in the chemical bond, electronic configuration and oxidation states, density of uncoupled electrons on paramagnetic ions, degree of participation of the low binding energy filled electronic shells of lanthanide and ligands information of the outer and inner valence molecular orbitals, lanthanide close environment structure in amorphous materials, etc.).

Key words: X-ray photoelectron spectroscopy, outer and inner valence molecular orbitals, lanthanide

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