The extraction of lithium from aqueous solutions of LiNTf and LiCl salts using benzo-15-crown-5 ether (B15C5) as an extractant in [C8mim][NTf] ionic liquid was studied. The transition of the extractant into the aqueous phase and the distribution of Cl ions during lithium extraction from LiCl solutions were determined. LiNTf complexes with B15C5 with different LiNTf:B15C5 ratios were isolated for the first time and characterized via X-ray diffraction and IR spectroscopy. Differences in the extraction process of LiCl and LiNTf were determined via an infrared spectroscopic study of the extraction systems.
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http://dx.doi.org/10.3390/molecules28030935 | DOI Listing |
J Colloid Interface Sci
February 2025
Independent Researcher, Halifax, Nova Scotia, Canada.
In pursuit of sustainable nanomaterial production, this study presents a novel biogenic fibrous silica sphere functionalized with a crown ether ionic liquid for advanced dual-adsorption of methyl orange and Cd(II) from aqueous solution. Sorghum waste serves as the silica source in the adsorbent preparation process, ensuring an eco-friendly approach. The benzo-15-crown-5 ionic liquid is coupled to thiol-functionalized fibrous silica spheres through an efficient thiol-ene click reaction.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2024
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
ZIF-8 membranes have long been prized for their exceptional CH/CH separation performance. On the other hand, ZIF-8 has structural flexibility, where the external pressure triggers channel expansion, potentially deteriorating the molecular sieving ability. Here, we demonstrate a reliable strategy to fine-tune the flexible pore structure of ZIF-8 by embedding crown ether within a ZIF-8 membrane.
View Article and Find Full Text PDFSoft Matter
October 2024
Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi 780-8520, Japan.
J Phys Chem A
September 2024
Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
We examined the conformation of benzo-15-crown-5 (B15C5) and benzo-18-crown-6 (B18C6) complexes with ammonium ions, NH, CHNH (MeNH), CHCHNH (EtNH), and CHCHCHNH (PrNH), using cold UV and IR spectroscopy in the gas phase. We measured the UV photodissociation (UVPD) spectra of the ammonium complexes and compared them with those of the K(B15C5) and K(B18C6) complexes in order to identify the conformation on the basis of the band position. The number of possible conformations for the ammonium complexes of B15C5 is limited compared with alkali metal ions with similar ionic radii.
View Article and Find Full Text PDFChemistry
August 2024
Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Robert-Rössle-Str. 10, Berlin-Buch, 13125, Germany.
Herein, we report the synthesis and sensing characteristics of 4,4'-methoxy-substituted BODIPY fluorescent probes (O-BODIPYs) 3, 4 and 5 equipped with differently sized benzo-crown ethers (cf. Scheme 1, 3 (benzo-15-crown-5), 4 (benzo-18-crown-6) and 5 (benzo-21-crown7)). O-BODIPYs 3, 4 and 5 exhibited in comparison to their known F-BODIPY analogues 3a, 4a and 5a (cf.
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