An Ion Pair Receptor for Selective Solid-Liquid Extraction of LiCl.

Autor: Hyun Oh J; Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Korea., Joong Kim M; Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Korea., Choi J; Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Korea., Chan Jeong H; Nonsan Carbon Neutrality Support Center, Konyang University, Nonsansi, 32992, Korea., Kuk Kim S; Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Korea.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2024 Dec 08, pp. e202403868. Date of Electronic Publication: 2024 Dec 08.
DOI: 10.1002/chem.202403868
Abstrakt: We have synthesized a new ion pair receptor (2) consisting of a cone-calix[4]arene bearing a combination of ethyl esters and ethers as a cation binding site and a calix[4]pyrrole subunit acting as an anion binding site. Ion pair receptor 2 complexes LiCl, NaCl, and CsCl among alkali metal chloride salts with distinct complexation modes and affinities in 10 % methanol-d 4 in chloroform-d. For instance, relatively small Li + and Na + cations are bound to the oxygen atoms of the functionalized calix[4]arene lower rim with Cl - being hydrogen bonded to the calix[4]pyrrole NHs while the larger Cs + cation is bound to the cone-shaped calix[4]pyrrole cavity via a π-cation interaction. By contrast, in the co-presence of all MCl salts (M=Li, Na, K, Rb, and Cs), receptor 2 binds LiCl with complete selectivity. Besides, receptor 2 is capable of extracting LiCl selectively into a chloroform or a dichloromethane organic phase from its solid source containing all other MCl salts.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: