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Non-aqueous separation of lithium and sodium perchlorates by selective coordination with a hexadentate semi-flexible amine ligand

Lookup NU author(s): Dr Jack Hemingway, Dr Paul Waddell, Matthew Lowe, Dr James DawsonORCiD, Dr Roly ArmstrongORCiD

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Abstract

This journal is © the Partner Organisations. Separation of lithium and sodium is a topic of substantial scientific and industrial importance. Regarding Li/Na perchlorates, which are not only environmental hazards but also useful oxidants in chemical synthesis, an efficient Li–Na perchlorate separation method has not been reported due to lack of a ligand which can selectively coordinate with one of the two. Herein, we report an efficient Li–Na perchlorate separation by using our hexadentate ligand N,N′,N″-tris-(2-N-diethylaminoethyl)-1,4,7-triaza-cyclononane (DETAN), which can selectively coordinate with LiClO4at room temperature to form a monomer in excellent yield but does not coordinate with NaClO4even at elevated temperature. The structure of the monomeric complex, [LiClO4(DETAN)] (1), was characterised by single-crystal X-ray diffraction and NMR spectroscopy.

Publication metadata

Author(s): Hemingway JM, Yang X, Waddell PG, Cornelio J, Lowe ME, Dawson JA, Slater PR, Armstrong RJ, Lu E

Publication type: Article

Publication status: Published

Journal: Inorganic Chemistry Frontiers

Year: 2026

Volume: 13

Issue: 3

Pages: 1073–1079

Online publication date: 25/11/2025

Acceptance date: 22/11/2025

Date deposited: 10/12/2025

ISSN (electronic): 2052-1553

Publisher: Royal Society of Chemistry

URL: https://doi.org/10.1039/d5qi01799h

DOI: 10.1039/d5qi01799h

Data Access Statement: Supplementary information (SI): additional experimental details, materials, and methods. See DOI: https://doi.org/ 10.1039/d5qi01799h. CCDC 2481385 contains the supplementary crystallographic data for this paper (https://doi.org/10.5517/ccdc.csd.cc2p92ps)

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