Application of X-ray absorption spectroscopy for L 3 -edges of Dy and Yb in dibenzoylmethanide complexes: Experiment and theoretical interpretation

Aleksandra Yu Andreeva, Ilia A. Pankin, Taisiya S. Sukhikh, Antonina N. Kravtsova, Sergey N. Konchenko, Svetlana G. Kozlova, Alexander V. Soldatov

Research output: Contribution to journalArticlepeer-review

Abstract

Local atomic and electronic structure of Dy- and Yb-based dibenzoylmethanide complexes has been investigated by analysis of experimental and theoretical L 3 -edge XANES spectra. The local atomic structure similarity between recrystallized and as-synthesized samples has been proved by XANES. Differences in the experimental XANES spectra collected for a Ln-complexes with a different ligand ratio (dbm - ): (O-btd - ) have been observed and assigned with a higher abundancy of elongated Ln-N bonds with respect to Ln-O for the sample where Ln-ions coordinated by higher number of O-btd - ligands. In this work we also critically discussed XANES simulations based on monoelectronic approach as implemented in FDMNES code for L 3 -edge spectra calculated for Ln-complexes. Density of electronic state calculation has been performed in order to elucidate the origin of the XANES features. Since the product yield of as-synthesized Ln-complexes is significantly higher rather than after re-crystallization this work demonstrate a high potential of DFT-assisted XANES analysis for the structural investigation of as-synthesized complexes without long-range atomic ordering.

Original languageEnglish
Pages (from-to)205-213
Number of pages9
JournalJournal of Molecular Structure
Volume1188
DOIs
Publication statusPublished - 15 Jul 2019

Keywords

  • DOS analysis
  • Electronic structure
  • Local atomic structure
  • Polynuclear lanthanide complexes
  • XANES
  • LIGANDS

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