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Mössbauer study of mixed-ligand complexes of europium(III)

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Abstract

A series of europium(III) mixed complexes was prepared containing 1,10-phenanthroline or 2,2′-bipyridine as neutral ligand and simple inorganic anions or benzoate and its derivatives as ionic ligands. The Mössbauer spectra of the products indicated that both types of ligands were directly coordinated to the central europium(III) atom. The Mössbauer isomer shift values reflected both electron shifting and steric effects of the substituents on the ligand. The quadrupole splitting values pointed to the similar symmetry of the electron shell of the europium in almost all complexes with analogous composition. The IR spectra provided evidence of the binding mode of the carboxylate groups in the complexes containing benzoate or its derivatives. The x-ray photoelectron spectra of the compounds demonstrated the effects of electrophilic and nucleophilic substituents on the electron binding energies in the europium, oxygen, and nitrogen orbitals.

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Correspondence to K. Burger.

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Burger, K., Nemes-Vetéssy, Z., Vértes, A. et al. Mössbauer study of mixed-ligand complexes of europium(III). Struct Chem 1, 251–258 (1990). https://doi.org/10.1007/BF00674269

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Keywords

  • Europium
  • Carboxylate Group
  • Isomer Shift
  • Bipyridine
  • Quadrupole Split