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 UstynyukNelly I ZhokhovaIgor P GloriozovPetr I MatveevMariia V EvsiuninaPavel S LemportAnton S PozdeevVladimir G PetrovAlexandr V YatsenkoViktor A TafeenkoValentine G NenajdenkoPublished in: International journal of molecular sciences (2022)
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 L Ln(NO 3 ) 3 and in the form of tight ion pairs {[ L Ln(NO 3 ) 2 H 2 O] + (NO 3 - ).