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Pan X, Wang Q, Ma Z, Qin Y, Lu X, Jin W, Zhu Y. Assisting Role of Water Molecules in Ionic Recognition by 18-Crown-6 Ether in Aqueous Solutions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Chalcogenolato-bridged rhenium(I)-based ester functionalized flexible dinuclear metallacrown ethers: Cation binding, molecular recognition and docking studies. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Heterocyclic Crown Ethers with Potential Biological and Pharmacological Properties: From Synthesis to Applications. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031102] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cyclic organic compounds with several ether linkages in their structure are of much concern in our daily life applications. Crown ethers (CEs) are generally heterocyclic and extremely versatile compounds exhibiting higher binding affinity. In recent years, due to their unique structure, crown ethers are widely used in drug delivery, solvent extraction, cosmetics manufacturing, material studies, catalysis, separation, and organic synthesis. Beyond their conventional place in chemistry, this review article summarizes the synthesis, biological, and potential pharmacological activities of CEs. We have emphasized the prospects of CEs as anticancer, anti-inflammatory, antibacterial, and antifungal agents and have explored their amyloid genesis inhibitory activity, electrochemical, and potential metric sensing properties. The central feature of these compounds is their ability to form selective and stable complexes with various organic and inorganic cations. Therefore, CEs can be used in gas chromatography as the stationary phase and are also valuable for cation chromatographic to determine and separate alkali and alkaline-earth cations.
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Computational study for the electrophilic reactivity prediction of crown ethers. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Warnock SJ, Sujanani R, Zofchak ES, Zhao S, Dilenschneider TJ, Hanson KG, Mukherjee S, Ganesan V, Freeman BD, Abu-Omar MM, Bates CM. Engineering Li/Na selectivity in 12-Crown-4-functionalized polymer membranes. Proc Natl Acad Sci U S A 2021; 118:e2022197118. [PMID: 34493651 PMCID: PMC8449368 DOI: 10.1073/pnas.2022197118] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Lithium is widely used in contemporary energy applications, but its isolation from natural reserves is plagued by time-consuming and costly processes. While polymer membranes could, in principle, circumvent these challenges by efficiently extracting lithium from aqueous solutions, they usually exhibit poor ion-specific selectivity. Toward this end, we have incorporated host-guest interactions into a tunable polynorbornene network by copolymerizing 1) 12-crown-4 ligands to impart ion selectivity, 2) poly(ethylene oxide) side chains to control water content, and 3) a crosslinker to form robust solids at room temperature. Single salt transport measurements indicate these materials exhibit unprecedented reverse permeability selectivity (∼2.3) for LiCl over NaCl-the highest documented to date for a dense, water-swollen polymer. As demonstrated by molecular dynamics simulations, this behavior originates from the ability of 12-crown-4 to bind Na+ ions more strongly than Li+ in an aqueous environment, which reduces Na+ mobility (relative to Li+) and offsets the increase in Na+ solubility due to binding with crown ethers. Under mixed salt conditions, 12-crown-4 functionalized membranes showed identical solubility selectivity relative to single salt conditions; however, the permeability and diffusivity selectivity of LiCl over NaCl decreased, presumably due to flux coupling. These results reveal insights for designing advanced membranes with solute-specific selectivity by utilizing host-guest interactions.
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Affiliation(s)
- Samuel J Warnock
- Materials Department, University of California, Santa Barbara, CA 93106
| | - Rahul Sujanani
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712
| | - Everett S Zofchak
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712
| | - Shou Zhao
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106
| | | | - Kalin G Hanson
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106
| | - Sanjoy Mukherjee
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106
| | - Venkat Ganesan
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712;
| | - Benny D Freeman
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712;
| | - Mahdi M Abu-Omar
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106;
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106
| | - Christopher M Bates
- Materials Department, University of California, Santa Barbara, CA 93106;
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106
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