Competing Routes in the Extraction of Lanthanide Nitrates by 1,10-Phenanthroline-2,9-diamides: An Impact of Structure of Complexes on the Extraction

Int J Mol Sci. 2022 Dec 8;23(24):15538. doi: 10.3390/ijms232415538.

Abstract

The fact of the fracture of the extraction curve of lanthanides by 1,10-phenanthroline-2,9-diamides is explained in terms of the structure of complexes, solvent extraction data and quantum chemical calculations. The solvent extraction proceeds in two competing directions: in the form of neutral complexes LLn(NO3)3 and in the form of tight ion pairs {[LLn(NO3)2 H2O]+ (NO3-).

Keywords: DFT calculations; N,O-hybrid ligands; X-ray diffraction; complex; lanthanides.

MeSH terms

  • Diamide
  • Lanthanoid Series Elements* / chemistry
  • Models, Molecular
  • Nitrates*
  • Solvents

Substances

  • 1,10-phenanthroline
  • Nitrates
  • Diamide
  • Lanthanoid Series Elements
  • Solvents