Phosphoryl Podands Ph2P(O)CH2O(CH2CH2O)nCH2P(O)Ph2 (Ln, n = 0–5): Complexation and Extraction of Rare Earth Elements. Crystal Structures of [Ln2L03(NO3)6] · xH2O (Ln = Nd, x = 1.99; Ln = Eu, x = 1; Ln = Er, x = 6.5; Ln = Lu, x = 6) and [LnL2(NO3)3(H2O)] (Ln = Nd, Er)


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Abstract

Extraction of rare earth elements with bis(diphenylphosphorylmethyl) ethers of oligoethylene glycols Ph2P(O)CH2O(CH2CH2O)nCH2P(O)Ph2 (Ln, n = 0–5) in 1,1,7-trihydrododecafluoroheptanol–water system with variable HNO3 concentration from 0.5 to 6 mol/L has been studied Complexes of Nd, Eu, Lu, and Er nitrates with L0 and L2 have been obtained. Crystal structures of [Ln2L30(NO3)6] · xH2O (Ln = Nd, x = 1.99; Ln = Eu, x = 1; Ln = Er, x = 6.5; Ln = Lu, x = 6) and [LnL2(NO3)3(H2O)] (Ln = Nd, Er) have been studied by X-ray diffraction, IR spectroscopy, and thermogravimetry. Correlation between X-ray diffraction and extraction data has been revealed.

About the authors

I. N. Polyakova

Kurnakov Institute of General and Inorganic Chemistry

Email: isivanova@mail.ru
Russian Federation, Moscow, 119991

E. S. Krivorot’ko

Frumkin Institute of Physical Chemistry and Electrochemistry

Email: isivanova@mail.ru
Russian Federation, Moscow, 119991

I. S. Ivanova

Kurnakov Institute of General and Inorganic Chemistry; Frumkin Institute of Physical Chemistry and Electrochemistry

Author for correspondence.
Email: isivanova@mail.ru
Russian Federation, Moscow, 119991; Moscow, 119991

E. N. Pyatova

Kurnakov Institute of General and Inorganic Chemistry; Frumkin Institute of Physical Chemistry and Electrochemistry

Email: isivanova@mail.ru
Russian Federation, Moscow, 119991; Moscow, 119991

S. V. Demin

Frumkin Institute of Physical Chemistry and Electrochemistry

Email: isivanova@mail.ru
Russian Federation, Moscow, 119991

V. I. Zhilov

Frumkin Institute of Physical Chemistry and Electrochemistry

Email: isivanova@mail.ru
Russian Federation, Moscow, 119991

V. E. Baulin

Frumkin Institute of Physical Chemistry and Electrochemistry; Institute of Physiologically Active Substances

Email: isivanova@mail.ru
Russian Federation, Moscow, 119991; Chernogolovka, Moscow oblast, 142432

A. B. Ilyukhin

Kurnakov Institute of General and Inorganic Chemistry

Email: isivanova@mail.ru
Russian Federation, Moscow, 119991

A. Yu. Tsivadze

Frumkin Institute of Physical Chemistry and Electrochemistry

Email: isivanova@mail.ru
Russian Federation, Moscow, 119991

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