Competing Routes in the Extraction of Lanthanide Nitrates by 1,10-Phenanthroline-2,9-diamides: An Impact of Structure of Complexes on the Extraction
- Yuri A. Ustynyuk
- Nelly I. Zhokhova
- Igor P. Gloriozov
- Petr I. Matveev
- Mariia V. Evsiunina
- Pavel S. Lemport
- Anton S. Pozdeev
- Vladimir G. Petrov
- Alexandr V. Yatsenko
- Viktor A. Tafeenko
- Valentine G. Nenajdenko
Publication date
December 2022
DOI Publisher
MDPI AG Journal
International Journal of Molecular SciencesAbstract
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−)
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