| Autor: |
Slobodskaia SS; Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia. SlobodskayaSi@yandex.ru., Tsebrikova GS; Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia. SlobodskayaSi@yandex.ru., Solov'ev VP; Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia. SlobodskayaSi@yandex.ru., Ivanova IS; Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia., Pyatova EN; Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia., Baulin VE; Institute of Physiologically Active Substances, Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka, Moscow region 142432, Russia., Safiulina AM; Joint-Stock Company 'Advanced Research Institute of Inorganic Materials named after Academician A. A. Bochvar', Moscow 123098, Russia.; Mendeleev Russian University of Chemical Technology, Moscow 125047, Russia., Tsivadze AY; Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia. SlobodskayaSi@yandex.ru. |
| Abstrakt: |
Phosphoryl podands of neutral type with a flexible ethylene glycol chain and diphenylphosphorylmethyl end groups are known for their complexation properties towards various cations. In this work, the complexation process between 1,3-bis(diphenylphosphoryl)-2-oxapropane (L) and lanthanide ions was studied. Namely, the stability constants of lanthanide complexes with L in acetonitrile were estimated by the method of spectrophotometric titration. It was found that the stability constants of Ln 3+ complexes with L increase in the lanthanide series, which is consistent with the extraction and ion-selective properties of L. The extraction ability of L and this ligand in the presence of ionic liquids (ILs) such as methyltrioctylammonium nitrate (MTOAN) and bis[(trifluoromethyl)sulfonyl]imide 1-butyl-3-methylimidazolium (C 4 mimTf 2 N) was studied. It was found that in the presence of ILs, L extracts the elements of the yttrium subgroup of lanthanides much better than those of the cerium subgroup: SF Lu/Ce (L-MTOAN) = 2.29; SF Lu/Ce (L-C 4 mimTf 2 N) = 110.38. The use of the L-C 4 mimTf 2 N mixture in the processes of lanthanide separation into subgroups is much more efficient than the use of L without the addition of ILs or the use of the L-MTOAN mixture. The ion-selective properties of L towards Ln 3+ ions were studied. Podand L exhibits potentiometric selectivity to Lu 3+ ions. |
