Preparation of pyrrolidinyl diglycolamide bonded silica particles and its rare earth separation properties

Yiwen Wang; Aijun Gong; Lina Qiu; Weiwei Zhang; Mory Traore; Yuzhen Bai; Yang Liu; Ge Gao; Weiyu Zhao; Wenyan Qin; Rongrong Fan; Yueyi You; Yi Chen

doi:10.1016/j.chroma.2022.463396

Preparation of pyrrolidinyl diglycolamide bonded silica particles and its rare earth separation properties

J Chromatogr A. 2022 Oct 11:1681:463396. doi: 10.1016/j.chroma.2022.463396. Epub 2022 Aug 21.

Authors

Yiwen Wang¹, Aijun Gong², Lina Qiu¹, Weiwei Zhang³, Mory Traore¹, Yuzhen Bai¹, Yang Liu¹, Ge Gao¹, Weiyu Zhao¹, Wenyan Qin⁴, Rongrong Fan⁵, Yueyi You¹, Yi Chen¹

Affiliations

¹ College of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, University of Science and Technology Beijing, Beijing 100083, China.
² College of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, University of Science and Technology Beijing, Beijing 100083, China. Electronic address: Gongaijun5661@ustb.edu.cn.
³ Basic Experimental Center for Natural Science, University of Science and Technology Beijing, Beijing 100083, China.
⁴ CapitalBio Technology Inc., Beijing 101111, China.
⁵ Kunshan Hexin Mass Spectrometry Technology Co, Ltd, Jiangsu 215300, China.

PMID: 36058080
DOI: 10.1016/j.chroma.2022.463396

Abstract

The separation of rare earth elements by solid phase containing diglycolamide-type ligands is a hot topic. In this study, 2-[2-oxo-2-(1-pyrrolidinyl)ethoxy]acetic acid (PYRDGA) was synthesized and attached to the silica. The binding strength of SiO₂@PYRDGA for rare earths showed a single increasing trend with the radius of rare earth atoms. IR and XPS spectra demonstrated that carbonyl oxygen and ether bond oxygen are binding sites for rare earth ions. SiO₂@PYRDGA was used for the chromatographic separation of REEs, and the primary separation of 16 REEs was achieved at pH = 2.0 using HNO₃ solution as the eluent, and La, Ce, Pr, Nd, Sm, and Eu reached the baseline separation level.

Keywords: Column chromatography; PYRDGA; REEs; Silica gel.

MeSH terms

Ethers
Ions
Ligands
Metals, Rare Earth* / analysis
Oxygen
Silicon Dioxide*

Substances

Ethers
Ions
Ligands
Metals, Rare Earth
Silicon Dioxide
Oxygen